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Rezaeian A, Hosseini Farzad M. Magneto-optical heterostructures with second resonance of transverse magneto-optical Kerr effect. Sci Rep 2024; 14:3493. [PMID: 38347068 PMCID: PMC10861523 DOI: 10.1038/s41598-024-54039-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 02/07/2024] [Indexed: 02/15/2024] Open
Abstract
Two conventional magneto-plasmonic (MP) structures are firstly superimposed with mirror symmetry to form a symmetric MP heterostructure. These two MP components are separated from each other by a noble metallic layer. The unique feature of this novel heterostructure is that both magneto-plasmon modes of the up and down MP portions can be coupled as the spacer becomes thinner. This intertwining effect leads to appearance of a new peak in the angular transverse magneto-optical Kerr effect (TMOKE) curve of the heterostructure. This new peak which is reported for the first time in the TMOKE signal, is generally similar to plasmon induced transparency (PIT) phenomenon observed in plasmonic multilayered structures. We entitle this novel effect as "second resonance of TMOKE signal". More importantly, the occurrence angle and magnitude of the second peak can be controlled by varying the thickness and material of separating layer between two MP parts. Also, the dispersion diagram of the heterostructure shows this coupling so that two branches convert into four branches by reducing the thickness of spacer. Furthermore, coupled oscillators model confirms emergence of the second peak in the TMOKE signal. These results can offer great promise for increasing sensitivity of conventional magneto-optical refractive index sensors.
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Affiliation(s)
- Amene Rezaeian
- Department of Physics, College of Sciences, Shiraz University, Shiraz, 71946-84795, Iran
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2
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Kuzmin DA, Usik MO, Bychkov IV, Bugaev AS, Shavrov VG, Temnov VV. Enhanced magnetic modulation of surface plasmon polaritons on hyperbolic metasurfaces. OPTICS LETTERS 2023; 48:3479-3482. [PMID: 37390160 DOI: 10.1364/ol.493787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 05/31/2023] [Indexed: 07/02/2023]
Abstract
In this Letter we demonstrate a fundamentally new, to the best of our knowledge, concept to enhance the magnetic modulation of the surface plasmon polaritons (SPPs) by using hybrid magneto-plasmonic structures consisting of hyperbolic plasmonic metasurfaces and magnetic dielectric substrates. Our results show that the magnetic modulation of SPPs in the proposed structures can be an order of magnitude stronger than in the hybrid metal-ferromagnet multilayer structures conventionally used in active magneto-plasmonics. We believe that this effect will allow for the further miniaturization of magneto-plasmonic devices.
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3
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Wu J, Qing YM. Tunable near-perfect nonreciprocal radiation with a Weyl semimetal and graphene. Phys Chem Chem Phys 2023; 25:9586-9591. [PMID: 36942521 DOI: 10.1039/d2cp05945b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Abstract
A tunable near-perfect nonreciprocal thermal emitter, consisting of a dielectric plane and a monolayer graphene sandwiched between a subwavelength grating and a Weyl semimetal plane, is proposed and investigated. Near-complete nonreciprocal radiation can be achieved at resonance, breaking the traditional Kirchhoff's law. The underlying physical mechanism, resulting from a guided mode resonance, is disclosed by illustrating the magnetic field distribution. Moreover, the strong nonreciprocity remains well within a wide range of geometrical parameters. What's more, the performance of the near-perfect spectral nonreciprocity can be flexibly controlled in a wide spectral range through varying the Fermi level of graphene and the axial vector of the Weyl semimetal, which reduces the cost and should be interesting for real application. The conclusions of this paper should prompt the further development of tunable nonreciprocal thermal emitters.
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Affiliation(s)
- Jun Wu
- College of Electrical Engineering, Anhui Polytechnic University, Wuhu, 241000, China.
| | - Ye Ming Qing
- College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing, 210023, China.
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4
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Beam steering at the nanosecond time scale with an atomically thin reflector. Nat Commun 2022; 13:3431. [PMID: 35701395 PMCID: PMC9198240 DOI: 10.1038/s41467-022-29976-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 03/11/2022] [Indexed: 01/22/2023] Open
Abstract
Techniques to mold the flow of light on subwavelength scales enable fundamentally new optical systems and device applications. The realization of programmable, active optical systems with fast, tunable components is among the outstanding challenges in the field. Here, we experimentally demonstrate a few-pixel beam steering device based on electrostatic gate control of excitons in an atomically thin semiconductor with strong light-matter interactions. By combining the high reflectivity of a MoSe2 monolayer with a graphene split-gate geometry, we shape the wavefront phase profile to achieve continuously tunable beam deflection with a range of 10°, two-dimensional beam steering, and switching times down to 1.6 nanoseconds. Our approach opens the door for a new class of atomically thin optical systems, such as rapidly switchable beam arrays and quantum metasurfaces operating at their fundamental thickness limit. Andersen et al. have demonstrated a new type of beam steering device based on the excitonic response of an atomically thin semiconductor. Using electrostatic gates, the authors achieved tunable steering with switching times on the nanosecond scale.
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5
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Wang Z, Wang Z, Gao M, Kong L, Lan J, Zhao J, Long P, Kang J, Zheng X, Huang S, Li S. Enhanced Faraday effects of magneto-plasmonic crystals with plasmonic hexagonal hole arrays. OPTICS EXPRESS 2022; 30:6700-6712. [PMID: 35299449 DOI: 10.1364/oe.449381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 01/10/2022] [Indexed: 06/14/2023]
Abstract
Magneto-optical (MO) properties of the bilayed Au/BIG and trilayered Au/BIG/Au magneto-plasmonic crystals (MPCs) were analyzed by the finite-difference time-domain method. In contrast to the low deflection angle and transmission of the smooth thin film, all the heterostructures with perforated holes in the top Au film displayed a similar trend with two strong resonant bands in Faraday rotation and transmittance in the near infrared wavelength range. The bands and electric distribution relative to the component and hole structure were revealed. The MPC with plasmonic hexagonal holes was found to own superior Faraday effects with distinctive anisotropy. The evolution of the resonant bands with the size and period of hexagonal holes, the thickness of different layers, and the incident light polarization was illustrated. The Faraday rotation of the optimized bilayed and trilayered hexagonal MPCs was improved 15.3 and 17.5 times, and the transmittance was enhanced 12.1 and 11.1 folds respectively at the resonant wavelength in comparison to the continuous Au/BIG film, indicating that the systems might find potential application in MO devices.
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Theoretical Study on Metasurfaces for Transverse Magneto-Optical Kerr Effect Enhancement of Ultra-Thin Magnetic Dielectric Films. NANOMATERIALS 2021; 11:nano11112825. [PMID: 34835591 PMCID: PMC8621794 DOI: 10.3390/nano11112825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 10/17/2021] [Accepted: 10/21/2021] [Indexed: 11/17/2022]
Abstract
We study how to enhance the transverse magneto-optical Kerr effect (TMOKE) of ultra-thin magnetic dielectric films through the excitation of strong magnetic resonances on metasurface with a metal nanowire array stacked above a metal substrate with an ultra-thin magnetic dielectric film spacer. The plasmonic hybridizations between the Au nanowires and substrate result in magnetic resonances. The periodic arrangement of the Au nanowires can excite propagating surface plasmon polaritons (SPPs) on the metal surface. When the SPPs and the magnetic resonances hybridize, they can strongly couple to form two strong magnetic resonances, which are explained by a coupled oscillator model. Importantly, benefitting from the strong magnetic resonances, we can achieve a large TMOKE signal up to 26% in the ultra-thin magnetic dielectric film with a thickness of only 30 nm, which may find potential applications in nanophotonics, magnonics, and spintronics.
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7
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Bi Y, Huang L, Li X, Wang Y. Magnetically controllable metasurface and its application. FRONTIERS OF OPTOELECTRONICS 2021; 14:154-169. [PMID: 36637664 PMCID: PMC9743948 DOI: 10.1007/s12200-021-1125-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 01/19/2021] [Indexed: 05/05/2023]
Abstract
The dynamic control of the metasurface opens up a vital technological approach for the development of multifunctional integrated optical devices. The magnetic field manipulation has the advantages of sub-nanosecond ultra-fast response, non-contact, and continuous adjustment. Thus, the magnetically controllable metasurface has attracted significant attention in recent years. This study introduces the basic principles of the Faraday and Kerr effect of magneto-optical (MO) materials. It classifies the typical MO materials according to their properties. It also summarizes the physical mechanism of different MO metasurfaces that combine the MO effect with plasmonic or dielectric resonance. Besides, their applications in the nonreciprocal device and MO sensing are demonstrated. The future perspectives and challenges of the research on MO metasurfaces are discussed.
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Affiliation(s)
- Yu Bi
- Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education; School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081, China
| | - Lingling Huang
- Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education; School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081, China.
| | - Xiaowei Li
- Laser Micro/Nano-Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Yongtian Wang
- Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education; School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081, China
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Wang X, Jian J, Wang H, Liu J, Pachaury Y, Lu P, Rutherford BX, Gao X, Xu X, El-Azab A, Zhang X, Wang H. Nitride-Oxide-Metal Heterostructure with Self-Assembled Core-Shell Nanopillar Arrays: Effect of Ordering on Magneto-Optical Properties. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2007222. [PMID: 33448118 DOI: 10.1002/smll.202007222] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Indexed: 06/12/2023]
Abstract
Magneto-optical (MO) coupling incorporates photon-induced change of magnetic polarization that can be adopted in ultrafast switching, optical isolators, mode convertors, and optical data storage components for advanced optical integrated circuits. However, integrating plasmonic, magnetic, and dielectric properties in one single material system poses challenges since one natural material can hardly possess all these functionalities. Here, co-deposition of a three-phase heterostructure composed of a durable conductive nitride matrix with embedded core-shell vertically aligned nanopillars, is demonstrated. The unique coupling between ferromagnetic NiO core and atomically sharp plasmonic Au shell enables strong MO activity out-of-plane at room temperature. Further, a template growth process is applied, which significantly enhances the ordering of the nanopillar array. The ordered nanostructure offers two schemes of spin polarization which result in stronger antisymmetry of Kerr rotation. The presented complex hybrid metamaterial platform with strong magnetic and optical anisotropies is promising for tunable and modulated all-optical-based nanodevices.
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Affiliation(s)
- Xuejing Wang
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Jie Jian
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Haohan Wang
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Juncheng Liu
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Yash Pachaury
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Ping Lu
- Sandia National Laboratories, Albuquerque, NM, 87185, USA
| | - Bethany X Rutherford
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Xingyao Gao
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Xiaoshan Xu
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Anter El-Azab
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Xinghang Zhang
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Haiyan Wang
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, 47907, USA
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All-dielectric magnetic metasurface for advanced light control in dual polarizations combined with high-Q resonances. Nat Commun 2020; 11:5487. [PMID: 33127921 PMCID: PMC7599251 DOI: 10.1038/s41467-020-19310-x] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 10/02/2020] [Indexed: 11/13/2022] Open
Abstract
Nanostructured magnetic materials provide an efficient tool for light manipulation on sub-nanosecond and sub-micron scales, and allow for the observation of the novel effects which are fundamentally impossible in smooth films. For many cases of practical importance, it is vital to observe the magneto-optical intensity modulation in a dual-polarization regime. However, the nanostructures reported on up to date usually utilize a transverse Kerr effect and thus provide light modulation only for p-polarized light. We present a concept of a transparent magnetic metasurface to solve this problem, and demonstrate a novel mechanism for magneto-optical modulation. A 2D array of bismuth-substituted iron-garnet nanopillars on an ultrathin iron-garnet slab forms a metasurface supporting quasi-waveguide mode excitation. In contrast to plasmonic structures, the all-dielectric magnetic metasurface is shown to exhibit much higher transparency and superior quality-factor resonances, followed by a multifold increase in light intensity modulation. The existence of a wide variety of excited mode types allows for advanced light control: transmittance of both p- and s-polarized illumination becomes sensitive to the medium magnetization, something that is fundamentally impossible in smooth magnetic films. The proposed metasurface is very promising for sensing, magnetometry and light modulation applications. The authors fabricate and investigate the metasurface made of 2D iron-garnet subwavelength nanopillar array on a thin iron-garnet film. It exhibits high quality-factor resonances, leading to a multifold increase in light intensity modulation of the transmitted light with an advantage of P and S polarizations both sensitive to the medium magnetization.
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10
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Characterisation and Manipulation of Polarisation Response in Plasmonic and Magneto-Plasmonic Nanostructures and Metamaterials. Symmetry (Basel) 2020. [DOI: 10.3390/sym12081365] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Optical properties of metal nanostructures, governed by the so-called localised surface plasmon resonance (LSPR) effects, have invoked intensive investigations in recent times owing to their fundamental nature and potential applications. LSPR scattering from metal nanostructures is expected to show the symmetry of the oscillation mode and the particle shape. Therefore, information on the polarisation properties of the LSPR scattering is crucial for identifying different oscillation modes within one particle and to distinguish differently shaped particles within one sample. On the contrary, the polarisation state of light itself can be arbitrarily manipulated by the inverse designed sample, known as metamaterials. Apart from polarisation state, external stimulus, e.g., magnetic field also controls the LSPR scattering from plasmonic nanostructures, giving rise to a new field of magneto-plasmonics. In this review, we pay special attention to polarisation and its effect in three contrasting aspects. First, tailoring between LSPR scattering and symmetry of plasmonic nanostructures, secondly, manipulating polarisation state through metamaterials and lastly, polarisation modulation in magneto-plasmonics. Finally, we will review recent progress in applications of plasmonic and magneto-plasmonic nanostructures and metamaterials in various fields.
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F. Carvalho WO, Mejía-Salazar JR. Plasmonics for Telecommunications Applications. SENSORS (BASEL, SWITZERLAND) 2020; 20:s20092488. [PMID: 32354016 PMCID: PMC7250033 DOI: 10.3390/s20092488] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/17/2020] [Accepted: 04/20/2020] [Indexed: 05/08/2023]
Abstract
Plasmonic materials, when properly illuminated with visible or near-infrared wavelengths, exhibit unique and interesting features that can be exploited for tailoring and tuning the light radiation and propagation properties at nanoscale dimensions. A variety of plasmonic heterostructures have been demonstrated for optical-signal filtering, transmission, detection, transportation, and modulation. In this review, state-of-the-art plasmonic structures used for telecommunications applications are summarized. In doing so, we discuss their distinctive roles on multiple approaches including beam steering, guiding, filtering, modulation, switching, and detection, which are all of prime importance for the development of the sixth generation (6G) cellular networks.
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Abstract
Here we report on designing a magnetic field sensor based on magnetoplasmonic crystal made of noble and ferromagnetic metals deposited on one-dimensional subwavelength grating. The experimental data demonstrate resonant transverse magneto-optical Kerr effect (TMOKE) at a narrow spectral region of 50 nm corresponding to the surface plasmon-polaritons excitation and maximum modulation of the reflected light intensity of 4.5% in a modulating magnetic field with the magnitude of 16 Oe. Dependences of TMOKE on external alternating current (AC) and direct current (DC) magnetic field demonstrate that it is a possibility to use the magnetoplasmonic crystal as a high-sensitive sensing probe. The achieved sensitivity to DC magnetic field is up to 10-6 Oe at local area of 1 mm2.
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13
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Bsawmaii L, Gamet E, Royer F, Neveu S, Jamon D. Longitudinal magneto-optical effect enhancement with high transmission through a 1D all-dielectric resonant guided mode grating. OPTICS EXPRESS 2020; 28:8436-8444. [PMID: 32225469 DOI: 10.1364/oe.385634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 02/23/2020] [Indexed: 06/10/2023]
Abstract
A significant enhancement of the longitudinal magneto-optical effect is demonstrated numerically and experimentally in transmission, and for small angles of incidence, through a subwavelength resonant structure consisting of a dielectric grating on top of a magneto-optical waveguide. The enhanced polarization rotation is associated with a high transmittance. These low footprint devices may thus be suitable for applications like magnetic field sensors or in non-destructive testing.
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14
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Shaltout AM, Shalaev VM, Brongersma ML. Spatiotemporal light control with active metasurfaces. Science 2019; 364:364/6441/eaat3100. [PMID: 31097638 DOI: 10.1126/science.aat3100] [Citation(s) in RCA: 205] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 04/17/2019] [Indexed: 12/15/2022]
Abstract
Optical metasurfaces have provided us with extraordinary ways to control light by spatially structuring materials. The space-time duality in Maxwell's equations suggests that additional structuring of metasurfaces in the time domain can even further expand their impact on the field of optics. Advances toward this goal critically rely on the development of new materials and nanostructures that exhibit very large and fast changes in their optical properties in response to external stimuli. New physics is also emerging as ultrafast tuning of metasurfaces is becoming possible, including wavelength shifts that emulate the Doppler effect, Lorentz nonreciprocity, time-reversed optical behavior, and negative refraction. The large-scale manufacturing of dynamic flat optics has the potential to revolutionize many emerging technologies that require active wavefront shaping with lightweight, compact, and power-efficient components.
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Affiliation(s)
- Amr M Shaltout
- Geballe Lab for Advanced Materials, Stanford University, Stanford, CA 94305, USA
| | - Vladimir M Shalaev
- Department of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47906, USA
| | - Mark L Brongersma
- Geballe Lab for Advanced Materials, Stanford University, Stanford, CA 94305, USA.
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15
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Salaheldeen M, Vega V, Caballero-Flores R, Prida VM, Fernández A. Influence of nanoholes array geometrical parameters on magnetic properties of Dy-Fe antidot thin films. NANOTECHNOLOGY 2019; 30:455703. [PMID: 31362273 DOI: 10.1088/1361-6528/ab36cc] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Nanoscale artificially engineered spintronic materials could be used to enlarge the storage density of magnetic recording media. For this purpose, magnetic nanostructures such as antidot arrays exhibiting high uniaxial magnetic anisotropy are new contestants in the field of ultrahigh density magnetic data storage devices. In this context, we focus on the synthesis of nanostructured magnetic materials consisting of Dy-Fe alloyed antidot thin films, deposited onto the surface of nanoporous alumina membranes served as patterned templates. Noticeable variations of in the in-plane magnetic anisotropy have been observed by modifying the layer thickness at both microscopic and macroscopic scales. The microscopic magnetic properties have been locally studied by Nano-MOKE magnetometry. For thinner antidot samples with 15, 20 and 25 nm in thickness, a tri-axial in-plane magnetic anisotropy has been detected. Meanwhile, for thicker antidot samples (40-60 nm of layer thickness), an in-plane uniaxial magnetic anisotropy has been noted. We attribute these changes in the magnetic anisotropy to the strong correlation between the edge-to-edge distance among adjacent nanoholes, W, and the local magnetic anisotropy of antidot samples. The effective magnetic anisotropy exhibits an unexpected crossover from the in-plane to out-of-plane direction due to the increasing of the effective perpendicular magnetic anisotropy with varying the layer thickness of antidot thin films. Therefore, we detected a critical layer thickness, t = 25 nm for the Dy-Fe alloy antidot arrays, at which the appearance of the perpendicular magnetization is observed. Furthermore, an enhancement in the Curie temperature of the antidot arrays compared to the continuous thin films has been obtained. We attribute these effects to the complex magnetization reversal processes and the high thermal stability of the hexagonal structure of antidot arrays. These findings can be of high interest for the development of novel magnetic sensors and for thermo-magnetic recording patterned media based on template-assisted deposition techniques.
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Affiliation(s)
- M Salaheldeen
- Physics Department, Faculty of Science, Sohag University, 82524 Sohag, Egypt. Depto. Física, Universidad de Oviedo, C/Federico García Lorca 18, E-33007 Oviedo, Asturias, Spain
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Application-Specific Oxide-Based and Metal-Dielectric Thin-Film Materials Prepared by Radio Frequency Magnetron Sputtering. MATERIALS 2019; 12:ma12203448. [PMID: 31640298 PMCID: PMC6829262 DOI: 10.3390/ma12203448] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/15/2019] [Accepted: 10/18/2019] [Indexed: 12/04/2022]
Abstract
We report on the development of several different thin-film functional material systems prepared by radio frequency (RF) magnetron sputtering at Edith Cowan University nanofabrication labs. While focusing on the RF sputtering process optimizations for new or the previously underexplored material compositions and multilayer structures, we disclose several unforeseen material properties and behaviours. Among these are an unconventional magnetic hysteresis loop with an intermediate saturation state observed in garnet trilayers, and an ultrasensitive magnetic switching behaviour in garnet-oxide composites (GOC). We also report on the unusually high thermal exposure stability observed in some nanoengineered metal–dielectric multilayers. We communicate research results related to the design, prototyping, and practical fabrication of high-performance magneto-optic (MO) materials, oxide-based sensor components, and heat regulation coatings for advanced construction and solar windows.
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Luong HM, Pham MT, Nguyen TD, Zhao Y. Magneto-plasmonic properties of Ag-Co composite nano-triangle arrays. NANOTECHNOLOGY 2019; 30:425203. [PMID: 31368449 DOI: 10.1088/1361-6528/ab30b8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The magneto-plasmonic properties of Ag-Co composite nano-triangle arrays are investigated. Both plasmonic and magnetic properties of the samples are found to strongly depend on the composition ratio of Ag and Co. Composite nano-triangle arrays exhibit strong plasmonic properties and low magneto-optics (MO) effect with high composition of Ag, and vice versa. The enhanced magneto-optic effect is also observed to be coincident with the localized surface plasmon resonance (LSPR) properties, i.e. the maximum Faraday effect occurs at the LSPR wavelength, which is due to locally high E-field. The composite triangle arrays with the 60% Co content show high plasmonic-MO performances characterized by magneto-optics-plasmonic correlation factor. All experimental results are confirmed by finite-difference time domain calculations.
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Affiliation(s)
- Hoang Mai Luong
- Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, United States of America
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18
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Chen Y, Xiao W, Han K, Shen X, Wang W. Magnetoplasmon excitation and hybridization in gyroelectric cylinders. APPLIED OPTICS 2019; 58:3712-3717. [PMID: 31158186 DOI: 10.1364/ao.58.003712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 04/08/2019] [Indexed: 06/09/2023]
Abstract
We investigate magnetoplasmon resonances and their coupling effects in gyroelectric cylinders. In individual cylinders, the dipole plasmon can be excited by plane wave illumination, and the dipole plasmon splits into lower energy and higher energy rotational magnetoplasmons in the presence of an external magnetic field. With respect to the external magnetic field, the two magnetoplasmons carry either right-handed chirality or left-handed chirality. In addition, originally dark plasmons can also be excited as the magnetic field increases. They are lower-order bulk plasmons (such as the radial breathing mode). In cylindrical dimers, the optically bright modes are combinations of magnetoplasmons with the same chirality. If the magnetic fields are antiparallel, the absorption spectra will be different for light incident from two opposite directions. This asymmetry can be well understood by carrying out eigenstate analysis, where the eigenstate does not possess mirror symmetry respecting the dimer axis. The dark modes engineering and asymmetrical optical behavior could have potential for terahertz device applications.
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Cichelero R, Kataja M, Campoy-Quiles M, Herranz G. Non-reciprocal diffraction in magnetoplasmonic gratings. OPTICS EXPRESS 2018; 26:34842-34852. [PMID: 30650901 DOI: 10.1364/oe.26.034842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 11/10/2018] [Indexed: 06/09/2023]
Abstract
Phase-matching conditions-used to bridge the wave vector mismatch between light and surface plasmon polaritons (SPPs)-have been exploited recently to enable nonreciprocal optical propagation and enhanced magneto-optic responses in magnetoplasmonic systems. Here we show that using diffraction in conjunction with plasmon excitations leads to a photonic system with a more versatile and flexible response. As a testbed, we analyzed diffracted magneto-optical effects in magnetoplasmonic gratings, where broken time-reversal symmetry induces frequency shifts in the energy and angular spectra of plasmon resonance. These result in exceptionally large responses in the diffracted magneto-optical effect. The concepts presented here can be used to develop non-reciprocal optical devices that exploit diffraction, in order to achieve tailored electromagnetic responses.
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Halagačka L, Vanwolleghem M, Vaurette F, Ben Youssef J, Postava K, Pištora J, Dagens B. Magnetoplasmonic nanograting geometry enables optical nonreciprocity sign control. OPTICS EXPRESS 2018; 26:31554-31566. [PMID: 30650739 DOI: 10.1364/oe.26.031554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 09/26/2018] [Indexed: 06/09/2023]
Abstract
We experimentally demonstrate a disruptive approach to control magnetooptical nonreciprocal effects. It has been known that the combination of a magneto-optically (MO) active substrate and extraordinary transmission (EOT) effects through deep-subwavelength nanoslits of a noble metal grating, leads to giant enhancements of the magnitude of the MO effects that would normally be obtained on just the bar substrate. This was demonstrated both in the transmission configuration, where the OET is directly observed, as well as in reflection configuration, where an increase of a transmitted power results in a decrease in reflected power. We show here that even more than just an enhancement, the MO effects can also undergo a sign reversal by achieving a hybridization of the different types of resonances at play in these EOT nanogratings. By tuning the geometrical profile of the grating's slits, one can engineer - for a fixed wavelength and fixed magnetization - the transverse MO Kerr effect (TMOKE) reflectivity of such a magnetoplasmonic system to be enhanced, extinguished or inversely enhanced. We have fabricated gold gratings with varying nanoslit widths on a Bi-substituted gadolinium iron garnet and experimentally confirmed such a behavior using a customized magneto-optic Mueller matrix ellipsometer. This demonstration allows new design paradigms for integrated nonreciprocal circuits and biochemical sensors with increased sensitivity and reduced footprint.
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21
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Floess D, Giessen H. Nonreciprocal hybrid magnetoplasmonics. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2018; 81:116401. [PMID: 30270847 DOI: 10.1088/1361-6633/aad6a8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The Faraday effect describes the phenomenon that a magnetized material can alter the polarization state of transmitted light. Interestingly, unlike most light-matter interactions in nature, it breaks Lorentz reciprocity. This exceptional behavior is utilized for applications such as optical isolators, which are core elements in communication and laser systems. While there is high demand for sub-micron nonreciprocal photonic devices, the realization of such systems is extremely challenging as conventional magneto-optic materials only provide weak magneto-optic response within small volumes. Plasmonics could be a key to overcome this hurdle in the future: over the last years there have been several lines of work demonstrating that different types of metallic nanostrutures can be utilized to greatly enhance the magneto-optic response of conventional materials. In this review we give an overview over the state of the art in the field and highlight recent developments on hybrid plasmonic Faraday rotators. Our discussions are mainly focused on the visible and near-infrared wavelength regions and cover both experimental realizations as well as analytical descriptions. Special attention will be paid to recent developments on hybrid plasmonic thin film systems consisting of gold and europium chalcogenides.
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Affiliation(s)
- Dominik Floess
- 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Stuttgart 70569, Germany
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22
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Amirsolaimani B, Gangopadhyay P, Persoons AP, Showghi SA, LaComb LJ, Norwood RA, Peyghambarian N. High sensitivity magnetometer using nanocomposite polymers with large magneto-optic response. OPTICS LETTERS 2018; 43:4615-4618. [PMID: 30272705 DOI: 10.1364/ol.43.004615] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 08/14/2018] [Indexed: 06/08/2023]
Abstract
Miniaturized magnetic field sensors are increasingly used in various applications, such as geophysical exploration for minerals and oil, volcanology, earthquake studies, and biomedical imaging. Existing magnetometers lack either the spatial or the temporal resolution or are restricted to costly shielded labs and cannot operate in an unshielded environment. Increasing spatio-temporal resolution would allow for real-time measurements of magnetic fluctuations with high resolution. Here we report on a new nanocomposite-based system for miniaturized magnetic field sensing. The sensor is based on Dy3+-doped magnetite and cobalt ferrite nanoparticles dispersed in a polymer matrix. Operation is feasible at room temperature and in an unshielded environment. A compact fiber-optic interferometer is used as the detection mechanism with 20 fT/√Hz sensitivity. We investigated the magnetic field response of the sensor and demonstrated the measurement of the human heartbeat as a potential application.
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Switchable plasmonic routers controlled by external magnetic fields by using magneto-plasmonic waveguides. Sci Rep 2018; 8:10584. [PMID: 30002560 PMCID: PMC6043596 DOI: 10.1038/s41598-018-28567-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 06/25/2018] [Indexed: 11/09/2022] Open
Abstract
We analytically and numerically investigate magneto-plasmons in metal films surrounded by a ferromagnetic dielectric. In such waveguide using a metal film with a thickness exceeding the Skin depth, an external magnetic field in the transverse direction can induce a significant spatial asymmetry of mode distribution. Superposition of the odd and the even asymmetric modes over a distance leads to a concentration of the energy on one interface which is switched to the other interface by the magnetic field reversal. The requested magnitude of magnetization is exponentially reduced with the increase of the metal film thickness. Based on this phenomenon, we propose a waveguide-integrated magnetically controlled switchable plasmonic routers with 99-%-high contrast within the optical bandwidth of tens of THz. This configuration can also operate as a magneto-plasmonic modulator.
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24
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Influence of Substrate Stage Temperature and Rotation Rate on the Magneto-Optical Quality of RF-Sputtered Bi2.1Dy0.9Fe3.9Ga1.1O12 Garnet Thin Films. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8030456] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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Gou P, Qian J, Xi F, Zou Y, Cao J, Yu H, Zhao Z, Yang L, Xu J, Wang H, Zhang L, An Z. Dramatically Enhanced Spin Dynamo with Plasmonic Diabolo Cavity. Sci Rep 2017; 7:5332. [PMID: 28706290 PMCID: PMC5509722 DOI: 10.1038/s41598-017-05634-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 05/31/2017] [Indexed: 11/08/2022] Open
Abstract
The applications of spin dynamos, which could potentially power complex nanoscopic devices, have so far been limited owing to their extremely low energy conversion efficiencies. Here, we present a unique plasmonic diabolo cavity (PDC) that dramatically improves the spin rectification signal (enhancement of more than three orders of magnitude) under microwave excitation; further, it enables an energy conversion efficiency of up to ~0.69 mV/mW, compared with ~0.27 μV/mW without a PDC. This remarkable improvement arises from the simultaneous enhancement of the microwave electric field (~13-fold) and the magnetic field (~195-fold), which cooperate in the spin precession process generates photovoltage (PV) efficiently under ferromagnetic resonance (FMR) conditions. The interplay of the microwave electromagnetic resonance and the ferromagnetic resonance originates from a hybridized mode based on the plasmonic resonance of the diabolo structure and Fabry-Perot-like modes in the PDC. Our work sheds light on how more efficient spin dynamo devices for practical applications could be realized and paves the way for future studies utilizing both artificial and natural magnetism for applications in many disciplines, such as for the design of future efficient wireless energy conversion devices, high frequent resonant spintronic devices, and magnonic metamaterials.
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Affiliation(s)
- Peng Gou
- State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai, 200433, China
| | - Jie Qian
- State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai, 200433, China
| | - Fuchun Xi
- State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai, 200433, China
| | - Yuexin Zou
- State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai, 200433, China
| | - Jun Cao
- State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai, 200433, China
| | - Haochi Yu
- State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai, 200433, China
| | - Ziyi Zhao
- State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai, 200433, China
| | - Le Yang
- State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai, 200433, China
| | - Jie Xu
- State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai, 200433, China
| | - Hengliang Wang
- State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai, 200433, China
| | - Lijian Zhang
- State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai, 200433, China
| | - Zhenghua An
- State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai, 200433, China.
- Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai, 200433, China.
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Biosensing Based on Magneto-Optical Surface Plasmon Resonance. Methods Mol Biol 2017. [PMID: 28281250 DOI: 10.1007/978-1-4939-6848-0_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
In spite of the high analytic potential of Magneto Optical Surface Plasmon Resonance (MOSPR) assays, their applicability to biosensing has been limited due to significant chip stability issues. We present novel solutions to surpass current limitations of MOSPR sensing assays, based on innovative chip structure, tailored measurements and improved data analysis methods. The structure of the chip is modified to contain a thin layer of Co-Au alloy instead of successive layers of homogenous metals with magnetic and plasmonic properties, as currently used. This new approach presents improved plasmonic and magnetic properties, yet a structural stability similar to standard Au-SPR chips, allowing for bioaffinity assays in saline solutions. Moreover, using a custom-designed measurement configuration that allows the acquisition of the SPR curve, i.e., the reflectivity measured at multiple angles of incidence, instead of the reflectivity value at a single-incidence angle, a high signal-to-noise ratio is achieved, suitable for detection of minute analyte concentrations. The proposed structure of the MOSPR sensing chip and the procedure of data analysis allow for long time assessment in liquid media, a significant advancement over existing MOSPR chips, and confirm the MOSPR increased sensitivity over standard SPR analyses.
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Fan F, Xu ST, Wang XH, Chang SJ. Terahertz polarization converter and one-way transmission based on double-layer magneto-plasmonics of magnetized InSb. OPTICS EXPRESS 2016; 24:26431-26443. [PMID: 27857376 DOI: 10.1364/oe.24.026431] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, we investigate the nonreciprocal circular dichroism for terahertz (THz) waves in magnetized InSb by the theoretical calculation and numerical simulation, which indicates that longitudinally magnetized InSb can be applied to the circular polarizer and nonreciprocal one-way transmission for the circular polarization THz waves. Furthermore, we propose a double-layer magnetoplasmonics based on the longitudinally magnetized InSb, and find two MO enhancement mechanisms in this device: the magneto surface plasmon resonance on the InSb-metal surface and Fabry-Pérot resonances between two orthogonal metallic gratings. These two resonance mechanisms enlarge the MO polarization rotation and greatly reduce the external magnetic field below 0.1T. The one-way transmission and perfect linear polarization conversion can be realized over 70dB, of which the transmittance can be modulated from 0 to 80% when the weak magnetic field changes from 0 to 0.1T under the low temperature around 200K. This magnetoplasmonic device has broad potential as a THz isolator, modulator, polarization convertor, and filter in the THz application systems.
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Hayek JN, Herreño-Fierro CA, Patiño EJ. Enhancement of the transversal magnetic optic Kerr effect: Lock-in vs. hysteresis method. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:103113. [PMID: 27802732 DOI: 10.1063/1.4966250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The lock-in amplifier is often used to study the enhancement of the magneto-optical Kerr effect (MOKE) in the presence of plasmon resonances. In the present work we show that it is possible to investigate such effect replacing the lock-in amplifier by a compensator, filter, and differential amplifier. This allows us to extract the full hysteresis loop in and out of the resonance without the need of a lock-in amplifier. Our results demonstrate these two setups are equivalent to study the enhancement of the transversal MOKE (T-MOKE) in magnetoplasmonic systems.
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Affiliation(s)
- Jorge Nicolás Hayek
- Departamento de Física, Universidad de los Andes, Carrera 1 No. 18A-12, A.A. 4976-12340, Bogotá, Colombia
| | - César A Herreño-Fierro
- Departamento de Física, Universidad de los Andes, Carrera 1 No. 18A-12, A.A. 4976-12340, Bogotá, Colombia
| | - Edgar J Patiño
- Departamento de Física, Universidad de los Andes, Carrera 1 No. 18A-12, A.A. 4976-12340, Bogotá, Colombia
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29
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Floess D, Weiss T, Tikhodeev S, Giessen H. Lorentz Nonreciprocal Model for Hybrid Magnetoplasmonics. PHYSICAL REVIEW LETTERS 2016; 117:063901. [PMID: 27541465 DOI: 10.1103/physrevlett.117.063901] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Indexed: 05/08/2023]
Abstract
Using localized surface plasmons, the magneto-optical response of dielectric thin films can be resonantly amplified and spectrally tailored. While the experimental realization and numerical simulation of such systems received considerable attention, so far, there is no analytical theoretical description. Here, we present a simple, intrinsically Lorentz nonreciprocal coupled oscillator model that reveals the underlying physics inside such systems and yields analytical expressions for the resonantly enhanced magneto-optical response. The predictions of the model are in good agreement with rigorous numerical solutions of Maxwell's equations for typical sample geometries. Our ansatz is transferable to other complex and hybrid nanooptical systems and will significantly facilitate device design.
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Affiliation(s)
- Dominik Floess
- 4th Physics Institute and Research Center SCOPE, University of Stuttgart, Stuttgart 70569, Germany
| | - Thomas Weiss
- 4th Physics Institute and Research Center SCOPE, University of Stuttgart, Stuttgart 70569, Germany
| | - Sergei Tikhodeev
- A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow 119991, Russia
| | - Harald Giessen
- 4th Physics Institute and Research Center SCOPE, University of Stuttgart, Stuttgart 70569, Germany
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30
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Jeong HJ, Kim D, Song JH, Jeong KY, Seo MK. Resonant magneto-optic Kerr effects of a single Ni nanorod in the Mie scattering regime. OPTICS EXPRESS 2016; 24:16904-16912. [PMID: 27464142 DOI: 10.1364/oe.24.016904] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We present a systematic, theoretical investigation of the polar magneto-optical (MO) Kerr effects of a single Ni nanorod in the Mie regime. The MO Kerr rotation, ellipticity, amplitude ratio, and phase shift are calculated as a function of the length and width of the nanorod. The electric field amplitude ratio of the MO Kerr effect is locally maximized when the nanorod supports a plasmonic resonance in the polarization state orthogonal to the incident light. The plasmonic resonances directly induced by the incident light do not enhance the amplitude ratio. In the Mie regime, multiple local maxima of the MO Kerr activity are supported by the resonant modes with different modal characteristics. From the viewpoint of first-order perturbation analysis, the spatial overlap between the incident-light-induced electric field and the Green function determines the local maxima.
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31
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Magneto-optical plasmonic heterostructure with ultranarrow resonance for sensing applications. Sci Rep 2016; 6:28077. [PMID: 27306301 PMCID: PMC4910117 DOI: 10.1038/srep28077] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 05/26/2016] [Indexed: 11/09/2022] Open
Abstract
Currently, sensors invade into our everyday life to bring higher life standards, excellent medical diagnostic and efficient security. Plasmonic biosensors demonstrate an outstanding performance ranking themselves among best candidates for different applications. However, their sensitivity is still limited that prevents further expansion. Here we present a novel concept of magnetoplasmonic sensor with ultranarrow resonances and high sensitivity. Our approach is based on the combination of a specially designed one-dimensional photonic crystal and a ferromagnetic layer to realize ultralong-range propagating magnetoplasmons and to detect alteration of the environment refractive index via observation of the modifications in the Transversal Magnetooptical Kerr Effect spectrum. The fabrication of such a structure is relatively easy in comparison with e.g. nanopatterned samples. The fabricated heterostructure shows extremely sharp (angular width of 0.06°) surface plasmon resonance and even sharper magnetoplasmonic resonance (angular width is 0.02°). It corresponds to the propagation length as large as 106 μm which is record for magnetoplasmons and promising for magneto-optical interferometry and plasmonic circuitry as well as magnetic field sensing. The magnitude of the Kerr effect of 11% is achieved which allows for detection limit of 1∙10(-6). The prospects of further increase of the sensitivity of this approach are discussed.
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32
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Kataja M, Pourjamal S, van Dijken S. Magnetic circular dichroism of non-local surface lattice resonances in magnetic nanoparticle arrays. OPTICS EXPRESS 2016; 24:3562-71. [PMID: 26907013 DOI: 10.1364/oe.24.003562] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Subwavelength metallic particles support plasmon resonances that allow extreme confinement of light down to the nanoscale. Irradiation with left- and right hand circularly polarized light results in the excitation of circular plasmon modes with opposite helicity. The Lorenz force lifts the degeneracy of the two modes in magnetic nanoparticles. Consequently, the confinement and frequency of localized surface plasmon resonances can be tuned by an external magnetic field. In this paper, we experimentally demonstrate this effect for nickel nanoparticles using magnetic circular dichroism (MCD). Besides, we show that non-local surface lattice resonances in periodic arrays of the same nanoparticles significantly enhance the MCD signal. A numerical model based on the modified long wavelength approximation is used to reproduce the main features in the experimental spectra and provide design rules for large MCD effects in sensing applications.
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33
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Magnetically controlled planar hyperbolic metamaterials for subwavelength resolution. Sci Rep 2015; 5:18172. [PMID: 26656499 PMCID: PMC4676063 DOI: 10.1038/srep18172] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2015] [Accepted: 11/13/2015] [Indexed: 11/21/2022] Open
Abstract
Breaking diffraction limitation is one of the most important issues and still remains to be solved for the demand of high-density optoelectronic components, especially for the photolithography industry. Since the scattered signals of fine feature (i.e. the size is smaller than half of the illuminating wavelength λ) are evanescent, these signals cannot be captured by using conventional glass- or plastic-based optical lens. Hence the corresponding fine feature is lost. In this work, we propose and analyze a magnetically controlled InSb-dielectric multi-layered structure with ability of subwavelength resolution at THz region. This layered structure can resolve subwavelength structures at different frequencies merely changing the magnitude of external magnetic field. Furthermore, the resolving power for a fixed incident frequency can be increased by only increasing the magnitude of applied external magnetic field. By using transfer matrix method and effective medium approach, the mechanism of achieving super resolution is elucidated. The electromagnetic numerical simulation results also prove the rationality and feasibility of the proposed design. Because the proposed device can be dynamically reconfigured by simply changing the magnitude of external magnetic field, it would provide a practical route for multi-functional material, real-time super-resolution imaging, and photolithography.
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Berger A, Alcaraz de la Osa R, Suszka AK, Pancaldi M, Saiz JM, Moreno F, Oepen HP, Vavassori P. Enhanced Magneto-Optical Edge Excitation in Nanoscale Magnetic Disks. PHYSICAL REVIEW LETTERS 2015; 115:187403. [PMID: 26565496 DOI: 10.1103/physrevlett.115.187403] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Indexed: 06/05/2023]
Abstract
We report unexpected enhancements of the magneto-optical effect in ferromagnetic Permalloy disks of diameter D<400 nm. The effect becomes increasingly pronounced for smaller D, reaching more than a 100% enhancement for D=100 nm samples. By means of experiments and simulations, the origin of this effect is identified as a nanoscale ring-shaped region at the disk edges, in which the magneto-optically induced electric polarization is enhanced. This leads to a modification of the electromagnetic near fields and causes the enhanced magneto-optical excitation, independent from any optical resonance.
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Affiliation(s)
- A Berger
- CIC nanoGUNE, E-20018 Donostia-San Sebastian, Spain
| | - R Alcaraz de la Osa
- Grupo de Óptica. Departamento de Física Aplicada. Universidad de Cantabria, Avenida de los Castros s/n, Santander, Spain
| | - A K Suszka
- CIC nanoGUNE, E-20018 Donostia-San Sebastian, Spain
| | - M Pancaldi
- CIC nanoGUNE, E-20018 Donostia-San Sebastian, Spain
| | - J M Saiz
- Grupo de Óptica. Departamento de Física Aplicada. Universidad de Cantabria, Avenida de los Castros s/n, Santander, Spain
| | - F Moreno
- Grupo de Óptica. Departamento de Física Aplicada. Universidad de Cantabria, Avenida de los Castros s/n, Santander, Spain
| | - H P Oepen
- Institut für Angewandte Physik, Universität Hamburg, Jungiusstraße 11, 20355 Hamburg, Germany
| | - P Vavassori
- CIC nanoGUNE, E-20018 Donostia-San Sebastian, Spain
- IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
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35
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Karimullah AS, Jack C, Tullius R, Rotello VM, Cooke G, Gadegaard N, Barron LD, Kadodwala M. Disposable Plasmonics: Plastic Templated Plasmonic Metamaterials with Tunable Chirality. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:5610-6. [PMID: 26306427 DOI: 10.1002/adma.201501816] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 07/02/2015] [Indexed: 05/27/2023]
Abstract
Development of low-cost disposable plasmonic substrates is vital for the applicability of plasmonic sensing. Such devices can be made using injection-molded templates to create plasmonic films. The elements of these plasmonic films are hybrid nanostructures composed of inverse and solid structures. Tuning the modal coupling between the two allows optimization of the optical properties for nanophotonic applications.
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Affiliation(s)
- Affar S Karimullah
- School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow, G12 8QQ, UK
| | - Calum Jack
- School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow, G12 8QQ, UK
| | - Ryan Tullius
- School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow, G12 8QQ, UK
| | - Vincent M Rotello
- Department of Chemistry, University of Massachusetts Amherst, 710 Nt. Pleasant Street, MA, 01003, USA
| | - Graeme Cooke
- School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow, G12 8QQ, UK
| | - Nikolaj Gadegaard
- School of Engineering, University of Glasgow, Rankine Building, Glasgow, G12 8QQ, UK
| | - Laurence D Barron
- School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow, G12 8QQ, UK
| | - Malcolm Kadodwala
- School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow, G12 8QQ, UK
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36
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Kuz’michev AN, Kreilkamp LE, Nur-E-Alam M, Bezus E, Vasiliev M, Akimov IA, Alameh K, Bayer M, Belotelov VI. Tunable Optical Nanocavity of Iron-garnet with a Buried Metal Layer. MATERIALS 2015. [PMCID: PMC5455716 DOI: 10.3390/ma8063012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Alexey N. Kuz’michev
- Lomonosov Moscow State University, Moscow 119991, Russia; E-Mail:
- Russian Quantum Center, Skolkovo, Moscow Region 143025, Russia
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +7-9672315757
| | - Lars E. Kreilkamp
- Experimentelle Physik 2, Technische Universitat Dortmund, D-44221 Dortmund, Germany; E-Mails: (L.E.K.); (I.A.A.); (M.B.)
| | - Mohammad Nur-E-Alam
- Electron Science Research Institute, Edith Cowan University, Joondalup, WA 6027, Australia; E-Mails: (M.N.-E-A.); (M.V.); (K.A.)
| | - Evgeni Bezus
- Image Processing Systems Institute, Russian Academy of Sciences, 443001 Samara, Russia; E-Mail:
- Samara State Aerospace University, 443086 Samara, Russia
| | - Mikhail Vasiliev
- Electron Science Research Institute, Edith Cowan University, Joondalup, WA 6027, Australia; E-Mails: (M.N.-E-A.); (M.V.); (K.A.)
| | - Iliya A. Akimov
- Experimentelle Physik 2, Technische Universitat Dortmund, D-44221 Dortmund, Germany; E-Mails: (L.E.K.); (I.A.A.); (M.B.)
- Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021 Saint Petersburg, Russia
| | - Kamal Alameh
- Electron Science Research Institute, Edith Cowan University, Joondalup, WA 6027, Australia; E-Mails: (M.N.-E-A.); (M.V.); (K.A.)
| | - Manfred Bayer
- Experimentelle Physik 2, Technische Universitat Dortmund, D-44221 Dortmund, Germany; E-Mails: (L.E.K.); (I.A.A.); (M.B.)
| | - Vladimir I. Belotelov
- Lomonosov Moscow State University, Moscow 119991, Russia; E-Mail:
- Russian Quantum Center, Skolkovo, Moscow Region 143025, Russia
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37
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Surface lattice resonances and magneto-optical response in magnetic nanoparticle arrays. Nat Commun 2015; 6:7072. [PMID: 25947368 PMCID: PMC4432637 DOI: 10.1038/ncomms8072] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 03/27/2015] [Indexed: 01/29/2023] Open
Abstract
Structuring metallic and magnetic materials on subwavelength scales allows for extreme confinement and a versatile design of electromagnetic field modes. This may be used, for example, to enhance magneto-optical responses, to control plasmonic systems using a magnetic field, or to tailor magneto-optical properties of individual nanostructures. Here we show that periodic rectangular arrays of magnetic nanoparticles display surface plasmon modes in which the two directions of the lattice are coupled by the magnetic field-controllable spin-orbit coupling in the nanoparticles. When breaking the symmetry of the lattice, we find that the optical response shows Fano-type surface lattice resonances whose frequency is determined by the periodicity orthogonal to the polarization of the incident field. In striking contrast, the magneto-optical Kerr response is controlled by the period in the parallel direction. The spectral separation of the response for longitudinal and orthogonal excitations provides versatile tuning of narrow and intense magneto-optical resonances.
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Magneto-Plasmonics and Resonant Interaction of Light with Dynamic Magnetisation in Metallic and All-Magneto-Dielectric Nanostructures. NANOMATERIALS 2015; 5:577-613. [PMID: 28347027 PMCID: PMC5312888 DOI: 10.3390/nano5020577] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 03/23/2015] [Accepted: 03/27/2015] [Indexed: 11/17/2022]
Abstract
A significant interest in combining plasmonics and magnetism at the nanoscale gains momentum in both photonics and magnetism sectors that are concerned with the resonant enhancement of light-magnetic-matter interaction in nanostructures. These efforts result in a considerable amount of literature, which is difficult to collect and digest in limited time. Furthermore, there is insufficient exchange of results between the two research sectors. Consequently, the goal of this review paper is to bridge this gap by presenting an overview of recent progress in the field of magneto-plasmonics from two different points of view: magneto-plasmonics, and magnonics and magnetisation dynamics. It is expected that this presentation style will make this review paper of particular interest to both general physical audience and specialists conducting research on photonics, plasmonics, Brillouin light scattering spectroscopy of magnetic nanostructures and magneto-optical Kerr effect magnetometry, as well as ultrafast all-optical and THz-wave excitation of spin waves. Moreover, readers interested in a new, rapidly emerging field of all-dielectric nanophotonics will find a section about all-magneto-dielectric nanostructures.
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Nan F, Zhang YF, Li X, Zhang XT, Li H, Zhang X, Jiang R, Wang J, Zhang W, Zhou L, Wang JH, Wang QQ, Zhang Z. Unusual and tunable one-photon nonlinearity in gold-dye plexcitonic Fano systems. NANO LETTERS 2015; 15:2705-10. [PMID: 25756956 DOI: 10.1021/acs.nanolett.5b00413] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Recent studies of the coupling between the plasmonic excitations of metallic nanostructures with the excitonic excitations of molecular species have revealed a rich variety of emergent phenomena known as plexcitonics. Here, we use a combined experimental and theoretical approach to demonstrate new and intriguing aspects in the ultrafast nonlinear responses of strongly coupled hybrid Fano systems consisting of gold nanorods decorated with near-infrared dye molecules. We show that the severely suppressed linear absorption around the Fano dip significantly enhances the unidirectional energy transfer from the plasmons to the excitons and further allows one-photon nonlinearity to be drastically and reversibly tuned. These striking observations are interpreted within a microscopic model stressing on two competing processes: saturated plasmonic absorption and weakened destructive Fano interference from the bleached excitonic absorption. The unusually strong one-photon nonlinearity revealed here provides a promising strategy in fabricating nanoplasmonic devices with both pronounced nonlinearities and good figures of merit.
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Affiliation(s)
- Fan Nan
- †Department of Physics, Wuhan University, Wuhan, Hubei 430072, People's Republic of China
| | - Ya-Fang Zhang
- †Department of Physics, Wuhan University, Wuhan, Hubei 430072, People's Republic of China
| | - Xiaoguang Li
- ‡Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, People's Republic of China
- §International Center for Quantum Design of Functional Materials (ICQD), University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Xiao-Tian Zhang
- §International Center for Quantum Design of Functional Materials (ICQD), University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Hang Li
- ∥State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, People's Republic of China
| | - Xinhui Zhang
- ∥State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, People's Republic of China
| | - Ruibin Jiang
- ⊥Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR People's Republic of China
| | - Jianfang Wang
- ⊥Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR People's Republic of China
| | - Wei Zhang
- #Institute of Applied Physics and Computational Mathematics, Beijing 100088, People's Republic of China
| | - Li Zhou
- †Department of Physics, Wuhan University, Wuhan, Hubei 430072, People's Republic of China
| | - Jia-Hong Wang
- †Department of Physics, Wuhan University, Wuhan, Hubei 430072, People's Republic of China
| | - Qu-Quan Wang
- †Department of Physics, Wuhan University, Wuhan, Hubei 430072, People's Republic of China
- ∇Institute for Advanced Study, Wuhan University, Wuhan, Hubei 430072, People's Republic of China
| | - Zhenyu Zhang
- §International Center for Quantum Design of Functional Materials (ICQD), University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
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A general strategy for nanohybrids synthesis via coupled competitive reactions controlled in a hybrid process. Sci Rep 2015; 5:9189. [PMID: 25818342 PMCID: PMC4377631 DOI: 10.1038/srep09189] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 02/23/2015] [Indexed: 11/09/2022] Open
Abstract
A new methodology based on core alloying and shell gradient-doping are developed for the synthesis of nanohybrids, realized by coupled competitive reactions, or sequenced reducing-nucleation and co-precipitation reaction of mixed metal salts in a microfluidic and batch-cooling process. The latent time of nucleation and the growth of nanohybrids can be well controlled due to the formation of controllable intermediates in the coupled competitive reactions. Thus, spatiotemporal-resolved synthesis can be realized by the hybrid process, which enables us to investigate nanohybrid formation at each stage through their solution color changes and TEM images. By adjusting the bi-channel solvents and kinetic parameters of each stage, the primary components of alloyed cores and the second components of transition metal doping ZnO or Al2O3 as surface coatings can be successively formed. The core alloying and shell gradient-doping strategy can efficiently eliminate the crystal lattice mismatch in different components. Consequently, varieties of gradient core-shell nanohybrids can be synthesized using CoM, FeM, AuM, AgM (M = Zn or Al) alloys as cores and transition metal gradient-doping ZnO or Al2O3 as shells, endowing these nanohybrids with unique magnetic and optical properties (e.g., high temperature ferromagnetic property and enhanced blue emission).
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Armelles G, Caballero B, Cebollada A, Garcia-Martin A, Meneses-Rodríguez D. Magnetic field modification of optical magnetic dipoles. NANO LETTERS 2015; 15:2045-9. [PMID: 25646869 DOI: 10.1021/nl5049115] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Acting on optical magnetic dipoles opens novel routes to govern light-matter interaction. We demonstrate magnetic field modification of the magnetic dipolar moment characteristic of resonant nanoholes in thin magnetoplasmonic films. This is experimentally shown through the demonstration of the magneto-optical analogue of Babinet's principle, where mirror imaged MO spectral dependencies are obtained for two complementary magnetoplasmonic systems: holes in a perforated metallic layer and a layer of disks on a substrate.
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Affiliation(s)
- Gaspar Armelles
- IMM-Instituto de Microelectrónica de Madrid (CNM-CSIC) , Isaac Newton 8, PTM, E-28760 Tres Cantos, Madrid, Spain
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Ezugwu S, Ye H, Fanchini G. Three-dimensional scanning near field optical microscopy (3D-SNOM) imaging of random arrays of copper nanoparticles: implications for plasmonic solar cell enhancement. NANOSCALE 2015; 7:252-260. [PMID: 25406826 DOI: 10.1039/c4nr05094k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In order to investigate the suitability of random arrays of nanoparticles for plasmonic enhancement in the visible-near infrared range, we introduced three-dimensional scanning near-field optical microscopy (3D-SNOM) imaging as a useful technique to probe the intensity of near-field radiation scattered by random systems of nanoparticles at heights up to several hundred nm from their surface. We demonstrated our technique using random arrays of copper nanoparticles (Cu-NPs) at different particle diameter and concentration. Bright regions in the 3D-SNOM images, corresponding to constructive interference of forward-scattered plasmonic waves, were obtained at heights Δz ≥ 220 nm from the surface for random arrays of Cu-NPs of ∼ 60-100 nm in diameter. These heights are too large to use Cu-NPs in contact of the active layer for light harvesting in thin organic solar cells, which are typically no thicker than 200 nm. Using a 200 nm transparent spacer between the system of Cu-NPs and the solar cell active layer, we demonstrate that forward-scattered light can be conveyed in 200 nm thin film solar cells. This architecture increases the solar cell photoconversion efficiency by a factor of 3. Our 3D-SNOM technique is general enough to be suitable for a large number of other applications in nanoplasmonics.
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Affiliation(s)
- Sabastine Ezugwu
- Department of Physics and Astronomy, University of Western Ontario, London, Ontario N6A 3K7, Canada.
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David S, Polonschii C, Luculescu C, Gheorghiu M, Gáspár S, Gheorghiu E. Magneto-plasmonic biosensor with enhanced analytical response and stability. Biosens Bioelectron 2015; 63:525-532. [DOI: 10.1016/j.bios.2014.08.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 08/01/2014] [Accepted: 08/04/2014] [Indexed: 10/24/2022]
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Lodewijks K, Maccaferri N, Pakizeh T, Dumas RK, Zubritskaya I, Akerman J, Vavassori P, Dmitriev A. Magnetoplasmonic design rules for active magneto-optics. NANO LETTERS 2014; 14:7207-14. [PMID: 25423352 DOI: 10.1021/nl504166n] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Light polarization rotators and nonreciprocal optical isolators are essential building blocks in photonics technology. These macroscopic passive devices are commonly based on magneto-optical Faraday and Kerr polarization rotation. Magnetoplasmonics, the combination of magnetism and plasmonics, is a promising route to bring these devices to the nanoscale. We introduce design rules for highly tunable active magnetoplasmonic elements in which we can tailor the amplitude and sign of the Kerr response over a broad spectral range.
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Affiliation(s)
- Kristof Lodewijks
- Department of Applied Physics, Chalmers University of Technology , 41296 Gothenburg, Sweden
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Khokhlov NE, Ignatyeva DO, Belotelov VI. Plasmonic pulse shaping and velocity control via photoexcitation of electrons in a gold film. OPTICS EXPRESS 2014; 22:28019-28026. [PMID: 25402042 DOI: 10.1364/oe.22.028019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We study the possibility of surface plasmon polariton (SPP) pulse shape, delay and duration manipulation on sub-picosecond timescales via a high intensity pump SPP pulse photoexciting electrons in a gold film. We present a theoretical model describing this process and show that the pump induces the phase modulation of the probe pulse leading to its compression by about 20% and the variation of the delay between two SPP pulses up to 15 fs for the incident fluence of the pump of 1.5 mJ∙cm⁻².
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Chekhov AL, Krutyanskiy VL, Shaimanov AN, Stognij AI, Murzina TV. Wide tunability of magnetoplasmonic crystals due to excitation of multiple waveguide and plasmon modes. OPTICS EXPRESS 2014; 22:17762-17768. [PMID: 25089396 DOI: 10.1364/oe.22.017762] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Magnetoplasmonic crystals (MPC) composed of a 1D gold grating on top of a magnetic garnet layer made by a combined ion-beam etching technique are studied. We demonstrate that this method allows to make high-quality MPC. It is shown that MPC with a 30-40 nm thick perforated gold layer provides an effective excitation of two surface plasmon-polariton modes and several numbers of waveguide modes in the garnet layer. An enhancement of the transversal magneto-optical effect up to the value of 10(-2) is observed for all types of resonant modes, that propagate in the magnetic layer, due to magnetic-field control over the mode excitation which is promising for future photonic devices.
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Gusev NA, Belotelov VI, Zvezdin AK. Surface plasmons in nanowires with toroidal magnetic structure. OPTICS LETTERS 2014; 39:4108-4111. [PMID: 25121663 DOI: 10.1364/ol.39.004108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We consider the problem of the influence of a toroidal magnetization on a cylindrical surface plasmon polariton (SPP) propagating along a nanowire of a circular cross section. It follows from the dispersion equations that the SPP wavenumber linearly depends on the toroidal moment and the effect of magneto-optical nonreciprocity appears. The numerical solution of the dispersion equations demonstrates that the corresponding splitting of the SPP dispersion curves for two opposite directions of the toroidal moment is increased by an order of magnitude with respect to the planar case. The largest values of this splitting are observed for systems with relatively low optical losses, as is demonstrated by calculations for SPPs in a gold cylinder surrounded by rare-earth bismuth iron garnet.
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Plasmonic quasicrystals with broadband transmission enhancement. Sci Rep 2014; 4:5257. [PMID: 24918659 PMCID: PMC4052717 DOI: 10.1038/srep05257] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Accepted: 05/22/2014] [Indexed: 11/09/2022] Open
Abstract
Plasmonic quasicrystals (PlQCs), by integrating the properties of quasicrystals (rotational symmetry and long range ordering but lack translational symmetry) and surface plasmon polariton mediated effects, offer several advantages over plasmonic crystals (PlCs). For example, in PlQCs one could have broadband, polarization independent response. However, large area patterning by electron beam lithography requires precise lattice coordinates as well as a practical way to design the structures for specific spectral response. We demonstrate design and fabrication of large area quasicrystal air hole patterns of π/5 symmetry in metal film in which broadband, polarization and launch angle independent transmission enhancement is observed. We demonstrate bi-grating quasicrystals to show that designable transmission response is possible over visible to near infrared wavelength regions with about 15 times enhancement. These would be useful in many applications like energy harvesting, nonlinear optics and quantum plasmonics.
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Maksymov IS, Hutomo J, Kostylev M. Transverse magneto-optical Kerr effect in subwavelength dielectric gratings. OPTICS EXPRESS 2014; 22:8720-8725. [PMID: 24718241 DOI: 10.1364/oe.22.008720] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We demonstrate theoretically a large transverse magneto-optical Kerr effect (TMOKE) in subwavelength gratings consisting of alternating magneto-insulating and nonmagnetic dielectric nanostripes. The reflectivity of the grating reaches 96% at the frequencies corresponding to the maximum of the TMOKE response. The combination of a large TMOKE response and high reflectivity is important for applications in 3D imaging, magneto-optical data storage, and magnonics.
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