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Armelles G, Domínguez-Vázquez JM, Conca A, Alvaro R, Cebollada A, Martín-González M. Multiresonant plasmon excitation in slit antennas on metallic and hyperbolic metamaterials. OPTICS EXPRESS 2023; 31:31039-31050. [PMID: 37710632 DOI: 10.1364/oe.498187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 08/20/2023] [Indexed: 09/16/2023]
Abstract
A comparative study of the optical properties of random and ordered arrays of metallic and hyperbolic slit antennas is presented. The metallic slits are fabricated on Au layers, whereas the hyperbolic ones are fabricated on Au/MgO multilayers. The random arrays show, for both types of antennas, similar slit plasmon resonances whose positions depend on the internal structure of the supporting layer. On the other hand, the spectra of the ordered arrays of the hyperbolic slits present additional resonances related to the excitation of Bloch plasmon polaritons in the hyperbolic layer. By varying the slit length and periodicity, an analysis of the interaction between slit localized resonance and Bloch plasmon polaritons is also presented.
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Brown LV, Davanco M, Sun Z, Kretinin A, Chen Y, Matson JR, Vurgaftman I, Sharac N, Giles A, Fogler MM, Taniguchi T, Watanabe K, Novoselov KS, Maier SA, Centrone A, Caldwell JD. Nanoscale Mapping and Spectroscopy of Nonradiative Hyperbolic Modes in Hexagonal Boron Nitride Nanostructures. NANO LETTERS 2018; 18:1628-1636. [PMID: 29451802 PMCID: PMC6140337 DOI: 10.1021/acs.nanolett.7b04476] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The inherent crystal anisotropy of hexagonal boron nitride (hBN) provides the ability to support hyperbolic phonon polaritons, that is, polaritons that can propagate with very large wave vectors within the material volume, thereby enabling optical confinement to exceedingly small dimensions. Indeed, previous research has shown that nanometer-scale truncated nanocone hBN cavities, with deep subdiffractional dimensions, support three-dimensionally confined optical modes in the mid-infrared. Because of optical selection rules, only a few of the many theoretically predicted modes have been observed experimentally via far-field reflection and scattering-type scanning near-field optical microscopy (s-SNOM). The photothermal induced resonance (PTIR) technique probes optical and vibrational resonances overcoming weak far-field emission by leveraging an atomic force microscope (AFM) probe to transduce local sample expansion caused by light absorption. Here we show that PTIR enables the direct observation of previously unobserved, dark hyperbolic modes of hBN nanostructures. Leveraging these optical modes and their wide range of angular and radial momenta could provide a new degree of control over the electromagnetic near-field concentration, polarization in nanophotonic applications.
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Affiliation(s)
- Lisa V. Brown
- Center for Nanoscale Science and Technology, National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, MD 20899 USA
- Maryland Nanocenter, University of Maryland, College Park, MD 20742
| | - Marcelo Davanco
- Center for Nanoscale Science and Technology, National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, MD 20899 USA
| | - Zhiyuan Sun
- Dept. Physics, University of California San Diego 9500 Gilman Dr, La Jolla, CA 92093 USA
| | - Andrey Kretinin
- School of Physics and Astronomy, University of Manchester, Oxford Rd, Manchester M13 9PL, UK
| | - Yiguo Chen
- The Blackett Laboratory, Imperial College London, London SW7 2AZ, UK
- Dept. of Electrical and Computer Engineering, National University of Singapore, Singapore 117576
| | - Joseph R. Matson
- Department of Mechanical Engineering, Vanderbilt University, 101 Olin Hall, Nashville, TN 37212 USA
| | - Igor Vurgaftman
- US Naval Research Laboratory, 4555 Overlook Ave S.W., Washington, DC 20375 USA
| | | | - Alexander Giles
- US Naval Research Laboratory, 4555 Overlook Ave S.W., Washington, DC 20375 USA
| | - Michael M. Fogler
- Dept. Physics, University of California San Diego 9500 Gilman Dr, La Jolla, CA 92093 USA
| | - Takashi Taniguchi
- National Institute for Materials Science, 1-1 Maniki, Tsukuba, Ibaraki 305-0044 Japan
| | - Kenji Watanabe
- National Institute for Materials Science, 1-1 Maniki, Tsukuba, Ibaraki 305-0044 Japan
| | - Kostya S. Novoselov
- School of Physics and Astronomy, University of Manchester, Oxford Rd, Manchester M13 9PL, UK
| | - Stefan A. Maier
- The Blackett Laboratory, Imperial College London, London SW7 2AZ, UK
- Fakultät für Physik, Ludwigs-Maximilians-Universität München, 80799 München, Germany
| | - Andrea Centrone
- Center for Nanoscale Science and Technology, National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, MD 20899 USA
| | - Joshua D. Caldwell
- Department of Mechanical Engineering, Vanderbilt University, 101 Olin Hall, Nashville, TN 37212 USA
- US Naval Research Laboratory, 4555 Overlook Ave S.W., Washington, DC 20375 USA
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Higuchi M, Takahara J. Plasmonic interpretation of bulk propagating waves in hyperbolic metamaterial optical waveguides. OPTICS EXPRESS 2018; 26:1918-1929. [PMID: 29401913 DOI: 10.1364/oe.26.001918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 01/15/2018] [Indexed: 06/07/2023]
Abstract
Hyperbolic metamaterials (HMMs) show great promise in photonics applications because their unconventional open isofrequency surface permits enlargement of wavenumbers without limitation. Although optical behaviors in HMMs can be macroscopically described by theoretical calculations with the effective medium approximation (EMA), neglect of microscopic phenomena in each layer leads to discrepancies from exact numerical results. We clarify the origin of bulk propagating waves in HMMs and we show that they can be classified into two modes: long- and short-range surface-plasmon-based coupled modes (LRSP and SRSP, respectively). Especially, we find that the ratio of the number of LRSP and SRSP couplings dominates the property of each propagation mode. This plasmonic interpretation bridges the gap between the EMA and numerical exact solutions, thereby facilitating studies on HMM applications.
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Giles AJ, Dai S, Glembocki OJ, Kretinin AV, Sun Z, Ellis CT, Tischler JG, Taniguchi T, Watanabe K, Fogler MM, Novoselov KS, Basov DN, Caldwell JD. Imaging of Anomalous Internal Reflections of Hyperbolic Phonon-Polaritons in Hexagonal Boron Nitride. NANO LETTERS 2016; 16:3858-65. [PMID: 27159255 DOI: 10.1021/acs.nanolett.6b01341] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
We use scanning near-field optical microscopy to study the response of hexagonal boron nitride nanocones at infrared frequencies, where this material behaves as a hyperbolic medium. The obtained images are dominated by a series of "hot" rings that occur on the sloped sidewalls of the nanocones. The ring positions depend on the incident laser frequency and the nanocone shape. Both dependences are consistent with directional propagation of hyperbolic phonon-polariton rays that are launched at the edges and zigzag through the interior of the nanocones, sustaining multiple internal reflections off the sidewalls. Additionally, we observe a strong overall enhancement of the near-field signal at discrete resonance frequencies. These resonances attest to low dielectric losses that permit coherent standing waves of the subdiffractional polaritons to form. We comment on potential applications of such shape-dependent resonances and the field concentration at the hot rings.
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Affiliation(s)
- Alexander J Giles
- U.S. Naval Research Laboratory , 4555 Overlook Avenue, S.W., Washington, DC 20375, United States
| | - Siyuan Dai
- Department of Physics, University of California San Diego , 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Orest J Glembocki
- U.S. Naval Research Laboratory , 4555 Overlook Avenue, S.W., Washington, DC 20375, United States
| | - Andrey V Kretinin
- School of Physics and Astronomy, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Zhiyuan Sun
- Department of Physics, University of California San Diego , 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Chase T Ellis
- U.S. Naval Research Laboratory , 4555 Overlook Avenue, S.W., Washington, DC 20375, United States
| | - Joseph G Tischler
- U.S. Naval Research Laboratory , 4555 Overlook Avenue, S.W., Washington, DC 20375, United States
| | - Takashi Taniguchi
- National Institute for Materials Science , 1-1 Namiki Tsukuba, Ibaraki 305-0047, Japan
| | - Kenji Watanabe
- National Institute for Materials Science , 1-1 Namiki Tsukuba, Ibaraki 305-0047, Japan
| | - Michael M Fogler
- Department of Physics, University of California San Diego , 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Kostya S Novoselov
- School of Physics and Astronomy, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Dimitri N Basov
- Department of Physics, University of California San Diego , 9500 Gilman Drive, La Jolla, California 92093, United States
- Department of Physics, Columbia University , 538 West 120th Street, New York, New York 10027, United States
| | - Joshua D Caldwell
- U.S. Naval Research Laboratory , 4555 Overlook Avenue, S.W., Washington, DC 20375, United States
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Bisht A, He W, Wang X, Wu LYL, Chen X, Li S. Hyperlensing at NIR frequencies using a hemispherical metallic nanowire lens in a sea-urchin geometry. NANOSCALE 2016; 8:10669-10676. [PMID: 27149522 DOI: 10.1039/c5nr09135g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Label-free and real time far-field super-resolution imaging (hyperlensing) at the nanoscale is of significant interest where sub-λ imaging remains a constraint because of Abbe's diffraction limit. Though by utilizing anisotropic permittivities, metal-dielectric multilayers have been successful in reconstructing high-frequency components of sub-λ objects, yet they remain cumbersome and expensive to make. Most of the multilayer structures require multiple vacuum deposition cycles and are plagued by stringent requirements on the surface roughness of metallic layers. In contrast to the multilayer structure here we propose a 3D hyperbolic metamaterial model composed of metallic nanorods arranged in a sea-urchin geometry as a hyper-lensing device, which is capable of projecting and magnifying diffraction limited information into the far-field at Near-infrared (NIR) frequencies. The hyperlens generates a band of flat hyperbolic dispersions in spherical coordinates, which in turn supports the propagation of high wave-vector spatial harmonics leading to far-field super-resolution imaging. Using full-wave finite-difference time-domain (FDTD) simulations with diffraction limited trimer, quadrumer and ringed objects etched on thin perfect electric conductor (PEC) films, we show that the hyperlens model can achieve magnification factors of up to 10× in the far-field (∼4.5λ from the object's surface) under a light source with a wavelength of 1 μm, with successful resolution down to 220 nm (∼λ/5). The magnified image field distribution projected into the far-field is shown to follow the object under a reduction in the symmetry. These results are important for making progress in the realization of real-time biomolecular imaging systems, eliminating the need for near-field scanning, destructive electron microscopy and various image post-processing techniques.
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Affiliation(s)
- Ankit Bisht
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore. and Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore.
| | - Wei He
- Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore.
| | - Xiaotian Wang
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.
| | - Linda Y L Wu
- Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore.
| | - Xiaodong Chen
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.
| | - Shuzhou Li
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.
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Zhong YK, Lai YC, Tu MH, Chen BR, Fu SM, Yu P, Lin A. Omnidirectional, polarization-independent, ultra-broadband metamaterial perfect absorber using field-penetration and reflected-wave-cancellation. OPTICS EXPRESS 2016; 24:A832-A845. [PMID: 27409956 DOI: 10.1364/oe.24.00a832] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, we present the result of nickel (Ni)-based metamaterial perfect absorbers (MPA) with ultra-broadband close-to-one absorbance. The experimental broadband characteristic is significantly improved over the past effort on metamaterial perfect absorbers. An in-depth physical picture and quantitative analysis is presented to reveal the physical origin of its ultrabroadband nature. The key constituent is the cancellation of the reflected wave using ultra-thin, moderate-extinction metallic films. The ultra-thin metal thickness can reduce the reflection as the optical field penetrates through the metallic films. This leads to minimal reflection at each ultra-thin metal layer, and light is penetrating into the Ni/SiO2 stacking. More intuitively, when the layer thickness is much smaller than the photon wavelength, the layer is essentially invisible to the photons. This results in absorption in the metal thin-film through penetration while there is minimal reflection by the metal film. More importantly, the experimental evidence for omni-directionality and polarization-insensitivity are established for the proposed design. Detailed measurement is conducted. Due to the ultrathin metal layers and the satisfactory tolerance in dielectric thickness, the broadband absorption has minimal degradation at oblique incidence. Such a wide angle, polarization-insensitive, ultra-broadband MPA can be very promising in the future, and the optical physics using sub-skin-depth metal film can also facilitate miniaturized high-performance nano-photonic devices.
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Keene D, Durach M. Hyperbolic resonances of metasurface cavities. OPTICS EXPRESS 2015; 23:18577-18588. [PMID: 26191916 DOI: 10.1364/oe.23.018577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We propose a new class of optical resonator structures featuring one or two metasurface reflectors or metacavities and predict that such resonators support novel hyperbolic resonances. As an example of such resonances we introduce hyperbolic Tamm plasmons (HTPs) and hyperbolic Fabry-Perot resonances (HFPs). The hyperbolic optical modes feature low-loss incident power re-distribution over TM and TE polarization output channels, clover-leaf anisotropic dispersion, and other unique properties which are tunable and are useful for multiple applications.
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Babicheva VE, Shalaginov MY, Ishii S, Boltasseva A, Kildishev AV. Finite-width plasmonic waveguides with hyperbolic multilayer cladding. OPTICS EXPRESS 2015; 23:9681-9689. [PMID: 25969005 DOI: 10.1364/oe.23.009681] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Engineering plasmonic metamaterials with anisotropic optical dispersion enables us to tailor the properties of metamaterial-based waveguides. We investigate plasmonic waveguides with dielectric cores and multilayer metal-dielectric claddings with hyperbolic dispersion. Without using any homogenization, we calculate the resonant eigenmodes of the finite-width cladding layers, and find agreement with the resonant features in the dispersion of the cladded waveguides. We show that at the resonant widths, the propagating modes of the waveguides are coupled to the cladding eigenmodes and hence, are strongly absorbed. By avoiding the resonant widths in the design of the actual waveguides, the strong absorption can be eliminated.
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Duncan C, Perret L, Palomba S, Lapine M, Kuhlmey BT, de Sterke CM. New avenues for phase matching in nonlinear hyperbolic metamaterials. Sci Rep 2015; 5:8983. [PMID: 25757863 PMCID: PMC4355635 DOI: 10.1038/srep08983] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 02/09/2015] [Indexed: 12/03/2022] Open
Abstract
Nonlinear optical processes, which are of paramount importance in science and technology, involve the generation of new frequencies. This requires phase matching to avoid that light generated at different positions interferes destructively. Of the two original approaches to achieve this, one relies on birefringence in optical crystals, and is therefore limited by the dispersion of naturally occurring materials, whereas the other, quasi-phase-matching, requires direct modulation of material properties, which is not universally possible. To overcome these limitations, we propose to exploit the unique dispersion afforded by hyperbolic metamaterials, where the refractive index can be arbitrarily large. We systematically analyse the ensuing opportunities and demonstrate that hyperbolic phase matching can be achieved with a wide range of material parameters, offering access to the use of nonlinear media for which phase matching cannot be achieved by other means. With the rapid development in the fabrication of hyperbolic metamaterials, our approach is destined to bring significant advantages over conventional techniques for the phase matching of a variety of nonlinear processes.
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Affiliation(s)
- C. Duncan
- Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), School of Physics, University of Sydney, NSW 2006, Australia
| | - L. Perret
- Institute of Photonics and Optical Science (IPOS), University of Sydney, NSW 2006, Australia
| | - S. Palomba
- Institute of Photonics and Optical Science (IPOS), University of Sydney, NSW 2006, Australia
| | - M. Lapine
- School of Mathematical Sciences, University of Technology Sydney, NSW 2007, Australia
- ITMO University, Saint Petersburg 197101, Russia
| | - B. T. Kuhlmey
- Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), School of Physics, University of Sydney, NSW 2006, Australia
- Institute of Photonics and Optical Science (IPOS), University of Sydney, NSW 2006, Australia
| | - C. Martijn de Sterke
- Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), School of Physics, University of Sydney, NSW 2006, Australia
- Institute of Photonics and Optical Science (IPOS), University of Sydney, NSW 2006, Australia
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10
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Mousavi SA, Plum E, Shi J, Zheludev NI. Coherent control of optical polarization effects in metamaterials. Sci Rep 2015; 5:8977. [PMID: 25755071 PMCID: PMC4354045 DOI: 10.1038/srep08977] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 02/12/2015] [Indexed: 11/21/2022] Open
Abstract
Processing of photonic information usually relies on electronics. Aiming to avoid the conversion between photonic and electronic signals, modulation of light with light based on optical nonlinearity has become a major research field and coherent optical effects on the nanoscale are emerging as new means of handling and distributing signals. Here we demonstrate that in slabs of linear material of sub-wavelength thickness optical manifestations of birefringence and optical activity (linear and circular birefringence and dichroism) can be controlled by a wave coherent with the wave probing the polarization effect. We demonstrate this in proof-of-principle experiments for chiral and anisotropic microwave metamaterials, where we show that the large parameter space of polarization characteristics may be accessed at will by coherent control. Such control can be exerted at arbitrarily low intensities, thus arguably allowing for fast handling of electromagnetic signals without facing thermal management and energy challenges.
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Affiliation(s)
- Seyedmohammad A Mousavi
- Optoelectronics Research Centre and Centre for Photonic Metamaterials, University of Southampton, SO17 1BJ, UK
| | - Eric Plum
- Optoelectronics Research Centre and Centre for Photonic Metamaterials, University of Southampton, SO17 1BJ, UK
| | - Jinhui Shi
- 1] Optoelectronics Research Centre and Centre for Photonic Metamaterials, University of Southampton, SO17 1BJ, UK [2] Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, College of Science, Harbin Engineering University, Harbin 150001, China
| | - Nikolay I Zheludev
- 1] Optoelectronics Research Centre and Centre for Photonic Metamaterials, University of Southampton, SO17 1BJ, UK [2] Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637378, Singapore
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West PR, Kinsey N, Ferrera M, Kildishev AV, Shalaev VM, Boltasseva A. Adiabatically tapered hyperbolic metamaterials for dispersion control of high-k waves. NANO LETTERS 2015; 15:498-505. [PMID: 25458533 DOI: 10.1021/nl5038352] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Hyperbolic metamaterials (HMMs) have shown great promise in the optical and quantum communities due to their extremely large, broadband photonic density of states. This feature is a direct consequence of supporting photonic modes with unbounded k-vectors. While these materials support such high-k waves, they are intrinsically confined inside the HMM and cannot propagate into the far-field, rendering them impractical for many applications. Here, we demonstrate how the magnitude of k-vectors can be engineered as the propagating radiation passes through media of differing dispersion relations (including type II HMMs and dielectrics) in the in-plane direction. The total outcoupling efficiency of waves in the in-plane direction is shown to be on average 2 orders of magnitude better than standard out-of-plane outcoupling methods. In addition, the outcoupling can be further enhanced using a proposed tapered HMM waveguide that is fabricated using a shadowed glancing angle deposition technique; thereby proving the feasibility of the proposed device. Applications for this technique include converting high-k waves to low-k waves that can be out-coupled into free-space and creating extremely high-k waves that are quickly quenched. Most importantly, this method of in-plane outcoupling acts as a bridge through which waves can cross between the regimes of low-k waves in classical dielectric materials and the high-k waves in HMMs with strongly reduced reflective losses.
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Affiliation(s)
- Paul R West
- School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University , West Lafayette, Indiana United States
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12
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Andryieuski A, Zhukovsky SV, Lavrinenko AV. Rough metal and dielectric layers make an even better hyperbolic metamaterial absorber. OPTICS EXPRESS 2014; 22:14975-14980. [PMID: 24977591 DOI: 10.1364/oe.22.014975] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We numerically investigate the influence of roughness in layer thicknesses on the properties of hyperbolic metamaterials (HMMs). We show that random spatial variation of dielectric and metal layer thicknesses, similar to what occurs during actual structure fabrication, leads to dramatic absorption increase compared to an ideal, smooth-layer HMM; the absorption increases more strongly when roughness is induced throughout the HMM rather than in its surface layer only. Hence, we have found that moderate surface roughness does not deteriorate the HMM functionality, at least in absorption-related applications, thus eliminating the challenge of ultrasmooth metal layer fabrication. More severe roughness can also prove useful in the design of inexpensive HMM-based broadband absorbers.
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Shekhar P, Atkinson J, Jacob Z. Hyperbolic metamaterials: fundamentals and applications. NANO CONVERGENCE 2014; 1:14. [PMID: 28191396 PMCID: PMC5271117 DOI: 10.1186/s40580-014-0014-6] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 03/03/2014] [Indexed: 05/25/2023]
Abstract
Metamaterials are nano-engineered media with designed properties beyond those available in nature with applications in all aspects of materials science. In particular, metamaterials have shown promise for next generation optical materials with electromagnetic responses that cannot be obtained from conventional media. We review the fundamental properties of metamaterials with hyperbolic dispersion and present the various applications where such media offer potential for transformative impact. These artificial materials support unique bulk electromagnetic states which can tailor light-matter interaction at the nanoscale. We present a unified view of practical approaches to achieve hyperbolic dispersion using thin film and nanowire structures. We also review current research in the field of hyperbolic metamaterials such as sub-wavelength imaging and broadband photonic density of states engineering. The review introduces the concepts central to the theory of hyperbolic media as well as nanofabrication and characterization details essential to experimentalists. Finally, we outline the challenges in the area and offer a set of directions for future work.
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Affiliation(s)
- Prashant Shekhar
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB T6G 2V4 Canada
| | - Jonathan Atkinson
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB T6G 2V4 Canada
| | - Zubin Jacob
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB T6G 2V4 Canada
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Reyes-Gómez E, Cavalcanti SB, Oliveira LE, de Carvalho CAA. Metric-signature topological transitions in dispersive metamaterials. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 89:033202. [PMID: 24730960 DOI: 10.1103/physreve.89.033202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Indexed: 06/03/2023]
Abstract
The metric signature topological transitions associated with the propagation of electromagnetic waves in a dispersive metamaterial with frequency-dependent and anisotropic dielectric and magnetic responses are examined in the present work. The components of the reciprocal-space metric tensor depend upon both the electric permittivity and magnetic permeability of the metamaterial, which are taken as Drude-like dispersive models. A thorough study of the frequency dependence of the metric tensor is presented which leads to the possibility of topological transitions of the isofrequency surface determining the wave dynamics inside the medium, to a diverging photonic density of states at some range of frequencies, and to the existence of large wave vectors' modes propagating through the metamaterial.
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Affiliation(s)
- E Reyes-Gómez
- Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - S B Cavalcanti
- Instituto de Física, Universidade Federal de Alagoas, Maceió, Alagoas 57072-970, Brazil
| | - L E Oliveira
- Instituto de Física, Universidade Estadual de Campinas - Unicamp, Campinas, São Paulo 13083-859, Brazil
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15
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Ferrari L, Lu D, Lepage D, Liu Z. Enhanced spontaneous emission inside hyperbolic metamaterials. OPTICS EXPRESS 2014; 22:4301-4306. [PMID: 24663753 DOI: 10.1364/oe.22.004301] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Hyperbolic metamaterials can enhance spontaneous emission, but the radiation-matter coupling is not optimized if the light source is placed outside such media. We demonstrate a 3-fold improvement of the Purcell factor over its outer value and a significant enlargement in bandwidth by including the emitter within a Si/Ag periodic multilayer metamaterial. To extract the plasmonic modes of the structure into the far field we implement two types of 1D grating with triangular and rectangular profile, obtaining a 10-fold radiative enhancement at visible frequencies.
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