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Sidor LM, Beaulieu MM, Rasskazov I, Acarturk BC, Ren J, Kamoen L, Vitali MV, Carney PS, Schmidt GR, Srubar III WV, Abbondanzieri EA, Meyer AS. Engineered bacteria that self-assemble "bioglass" polysilicate coatings display enhanced light focusing. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.03.597164. [PMID: 38895271 PMCID: PMC11185756 DOI: 10.1101/2024.06.03.597164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
Photonic devices are cutting-edge optical materials that produce narrow, intense beams of light, but their synthesis typically requires toxic, complex methodology. Here we employ a synthetic biology approach to produce environmentally-friendly, living microlenses with tunable structural properties. We engineered Escherichia coli bacteria to display the silica biomineralization enzyme silicatein from aquatic sea sponges. Our silicatein-expressing bacteria can self-assemble a shell of polysilicate "bioglass" around themselves. Remarkably, the polysilicate-encapsulated bacteria can focus light into intense nanojets that are nearly an order of magnitude brighter than unmodified bacteria. Polysilicate-encapsulated bacteria are metabolically active for up to four months, potentially allowing them to sense and respond to stimuli over time. Our data demonstrate that engineered bacterial particles have the potential to revolutionize the development of multiple optical and photonic technologies.
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Affiliation(s)
- Lynn M. Sidor
- Department of Biology, University of Rochester; Rochester, New York, USA
| | - Michelle M. Beaulieu
- Department of Physics and Astronomy, University of Rochester; Rochester, New York, USA
| | - Ilia Rasskazov
- Institute of Optics, University of Rochester; Rochester, New York, USA
- Current affiliation: SunDensity Inc.; Rochester, New York 14604, USA
| | - B. Cansu Acarturk
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder; Boulder, Colorado, USA
| | - Jie Ren
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder; Boulder, Colorado, USA
| | - Lycka Kamoen
- Department of Biotechnology, Delft University of Technology; Delft, The Netherlands
- Current affiliation: Institute of Biology, Leiden University; Leiden, The Netherlands
| | - María Vázquez Vitali
- Department of Biotechnology, Delft University of Technology; Delft, The Netherlands
| | - P. Scott Carney
- Institute of Optics, University of Rochester; Rochester, New York, USA
| | - Greg R. Schmidt
- Institute of Optics, University of Rochester; Rochester, New York, USA
| | - Wil V. Srubar III
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder; Boulder, Colorado, USA
- Materials Science and Engineering Program, University of Colorado Boulder; Boulder, Colorado, USA
| | | | - Anne S. Meyer
- Department of Biology, University of Rochester; Rochester, New York, USA
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Jin G, Upreti N, Rich J, Xia J, Zhao C, Huang TJ. Acoustofluidic scanning fluorescence nanoscopy with a large field of view. MICROSYSTEMS & NANOENGINEERING 2024; 10:59. [PMID: 38736715 PMCID: PMC11081950 DOI: 10.1038/s41378-024-00683-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 01/31/2024] [Accepted: 03/01/2024] [Indexed: 05/14/2024]
Abstract
Large-field nanoscale fluorescence imaging is invaluable for many applications, such as imaging subcellular structures, visualizing protein interactions, and high-resolution tissue imaging. Unfortunately, conventional fluorescence microscopy requires a trade-off between resolution and field of view due to the nature of the optics used to form the image. To overcome this barrier, we developed an acoustofluidic scanning fluorescence nanoscope that simultaneously achieves superior resolution, a large field of view, and strong fluorescent signals. The acoustofluidic scanning fluorescence nanoscope utilizes the superresolution capabilities of microspheres that are controlled by a programmable acoustofluidic device for rapid fluorescence enhancement and imaging. The acoustofluidic scanning fluorescence nanoscope resolves structures that cannot be resolved with conventional fluorescence microscopes with the same objective lens and enhances the fluorescent signal by a factor of ~5 without altering the field of view of the image. The improved resolution realized with enhanced fluorescent signals and the large field of view achieved via acoustofluidic scanning fluorescence nanoscopy provides a powerful tool for versatile nanoscale fluorescence imaging for researchers in the fields of medicine, biology, biophysics, and biomedical engineering.
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Affiliation(s)
- Geonsoo Jin
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708 USA
| | - Neil Upreti
- Department of Biomedical Engineering, Duke University, Durham, NC 27708 USA
| | - Joseph Rich
- Department of Biomedical Engineering, Duke University, Durham, NC 27708 USA
| | - Jianping Xia
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708 USA
| | | | - Tony Jun Huang
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708 USA
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3
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Su N, Zhang W, Zeng X, Wu P, Cui L, Chen X. Temperature-Controlled Switchable Photonic Nanojet Generated by Truncated Cylindrical Structure. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7209. [PMID: 38005137 PMCID: PMC10673144 DOI: 10.3390/ma16227209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/11/2023] [Accepted: 11/13/2023] [Indexed: 11/26/2023]
Abstract
We propose a novel micro-nano structure that can realize a photonic nanojet (PNJ) switch by adjusting the temperature, which is composed of a truncated cylinder coated with a thin vanadium dioxide (VO2) film. The influence of temperature on the maximum strength, full width at half maximum (FWHM), working distance, and focal length of the PNJ were studied by finite-difference time-domain (FDTD) method. The results demonstrate that the structure can adjust the open and close state of the PNJ by changing the temperature. A PNJ with varying characteristics can be obtained at both high and low temperatures, and the maximum intensity ratio of the PNJ can reach up to 7.25. This discovery provides a new way of optical manipulation, sensing and detection, microscopy imaging, optoelectronic devices, and other fields.
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Affiliation(s)
- Ning Su
- Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China; (N.S.); (W.Z.); (X.Z.)
| | - Weiming Zhang
- Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China; (N.S.); (W.Z.); (X.Z.)
| | - Xintao Zeng
- Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China; (N.S.); (W.Z.); (X.Z.)
| | - Pinghui Wu
- Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China; (N.S.); (W.Z.); (X.Z.)
| | - Lina Cui
- College of Textiles and Apparel, Quanzhou Normal University, Quanzhou 362000, China
| | - Xiaohui Chen
- Research Center for Photonics Technology, Quanzhou Normal University, Quanzhou 362000, China;
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4
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Jin G, Rich J, Xia J, Upreti N, Zhao C, Huang TJ. Acoustofluidic scanning fluorescence nanoscopy with large field of view. RESEARCH SQUARE 2023:rs.3.rs-3069123. [PMID: 37461478 PMCID: PMC10350121 DOI: 10.21203/rs.3.rs-3069123/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Nanoscale fluorescence imaging with a large-field view is invaluable for many applications such as imaging of subcellular structures, visualizing protein interaction, and high-resolution tissue imaging. Unfortunately, conventional fluorescence microscopy has to make a trade-off between resolution and field of view due to the nature of the optics used to form an image. To overcome this barrier, we have developed an acoustofluidic scanning fluorescence nanoscope that can simultaneously achieve superior resolution, a large field of view, and enhanced fluorescent signal. The acoustofluidic scanning fluorescence nanoscope utilizes the super-resolution capability of microspheres that are controlled by a programable acoustofluidic device for rapid fluorescent enhancement and imaging. The acoustofluidic scanning fluorescence nanoscope can resolve structures that cannot be achieved with a conventional fluorescent microscope with the same objective lens and enhances the fluorescent signal by a factor of ~5 without altering the field of view of the image. The improved resolution with enhanced fluorescent signal and large field of view via the acoustofluidic scanning fluorescence nanoscope provides a powerful tool for versatile nanoscale fluorescence imaging for researchers in the fields of medicine, biology, biophysics, and biomedical engineering.
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Affiliation(s)
- Geonsoo Jin
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Joseph Rich
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Jianping Xia
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Neil Upreti
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Chenglong Zhao
- Department of Physics, University of Dayton, 300 College Park, Dayton, OH 45469, USA
- Department of Electro-Optics and Photonics, University of Dayton, 300 College Park, Dayton, OH 45469, USA
| | - Tony Jun Huang
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
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Zeng X, Su N, Zhang W, Ye Z, Wu P, Liu B. Generation of Photonic Nanojet Using Gold Film Dielectric Microdisk Structure. MATERIALS (BASEL, SWITZERLAND) 2023; 16:3146. [PMID: 37109982 PMCID: PMC10146357 DOI: 10.3390/ma16083146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/29/2023] [Accepted: 04/12/2023] [Indexed: 06/19/2023]
Abstract
Due to their narrow beam waist size, high intensity, and long propagation distance, photonic nanojets (PNJs) can be used in various fields such as nanoparticle sensing, optical subwavelength detection, and optical data storage. In this paper, we report a strategy to realize an SPP-PNJ by exciting a surface plasmon polariton (SPP) on a gold-film dielectric microdisk. In detail, an SPP is excited by the grating-coupling method, then it irradiates the dielectric microdisk to form an SPP-PNJ. The characteristics of the SPP-PNJ, including maximum intensity, full width at half maximum (FWHM), and propagation distance, are studied by using finite difference time domain (FDTD) numerical solutions. The results demonstrate that the proposed structure can produce a high-quality SPP-PNJ, the maximum quality factor of which is 62.20, and the propagation distance of the SPP-PNJ is 3.08 λ. Furthermore, the properties of the SPP-PNJ can be modified flexibly by changing the thickness and refractive index of the dielectric microdisk.
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Affiliation(s)
- Xintao Zeng
- Research Center for Photonic Technology, Fujian Provincial Key Laboratory for Advanced Micro-Nano Photonics Technology and Devices, Quanzhou 362000, China
- Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China
| | - Ning Su
- Research Center for Photonic Technology, Fujian Provincial Key Laboratory for Advanced Micro-Nano Photonics Technology and Devices, Quanzhou 362000, China
- Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China
| | - Weiming Zhang
- Research Center for Photonic Technology, Fujian Provincial Key Laboratory for Advanced Micro-Nano Photonics Technology and Devices, Quanzhou 362000, China
- Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China
| | - Zhibin Ye
- College of Electrical and Information Engineering, Quzhou University, Quzhou 324000, China
| | - Pinghui Wu
- Research Center for Photonic Technology, Fujian Provincial Key Laboratory for Advanced Micro-Nano Photonics Technology and Devices, Quanzhou 362000, China
- Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China
| | - Bin Liu
- Rural Revitalization Institute, Linyi University, Linyi 276000, China
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Mussi V, Convertino A, Lisi A. Editorial for the Special Issue on Nanostructured Surfaces and Devices for Biomedical Applications. MICROMACHINES 2022; 13:2094. [PMID: 36557393 PMCID: PMC9782862 DOI: 10.3390/mi13122094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
The ability to control and modify the surface topography of materials at the nanoscale, which produces features with a comparable size to that of biological entities, so as to effectively probe and influence processes at both the cellular and the molecular level, has facilitated incredible possibilities in the fields of biomedicine, biosensing, and diagnostics [...].
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Affiliation(s)
- Valentina Mussi
- IMM CNR, Institute of Microelectronics and Microsystems, National Research Council, 00133 Rome, Italy
| | - Annalisa Convertino
- IMM CNR, Institute of Microelectronics and Microsystems, National Research Council, 00133 Rome, Italy
| | - Antonella Lisi
- IFT CNR, Institute of Translational Pharmacology, National Research Council, 00133 Rome, Italy
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Trukhova A, Pavlova M, Sinitsyna O, Yaminsky I. Microlens-assisted microscopy for biology and medicine. JOURNAL OF BIOPHOTONICS 2022; 15:e202200078. [PMID: 35691020 DOI: 10.1002/jbio.202200078] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 06/09/2022] [Accepted: 06/10/2022] [Indexed: 06/15/2023]
Abstract
The addition of dielectric transparent microlens in the optical scheme is an effective and at the same time simple and inexpensive way to increase the resolution of a light microscope. For these purposes, spherical and cylindrical microlenses with a diameter of 1-100 μm are usually used. The microlens focuses the light into a narrow beam called a photonic nanojet. An enlarged virtual image is formed, which is captured by the objective of the light microscope. In addition to microscopy, the microlenses are successfully applied to amplify optical signals, increase the trapping force of optical tweezers and are used in microsurgery. This review considers the design and principle of microlens-assisted microscopes. Taking into account the advantages of the super-resolution optical methods for research in life science, the examples of the use of the microlenses in biomedical practice are discussed in detail.
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Affiliation(s)
| | | | - Olga Sinitsyna
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Moscow, Russia
| | - Igor Yaminsky
- Moscow State University, Moscow, Russia
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Moscow, Russia
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Zhang J, Han G, Yang Z, Xie S, Zhan K. Photonic Hooks Generated by a Concave Micro-Cylinder Based on Structure-Constrained Functions. MICROMACHINES 2022; 13:1434. [PMID: 36144056 PMCID: PMC9501319 DOI: 10.3390/mi13091434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/21/2022] [Accepted: 08/24/2022] [Indexed: 06/16/2023]
Abstract
Owing to its crooked trajectory and small full width at half-maximum, photonic hook (PH) has attracted wide attention since its inception and experimental confirmation. However, the present generation and regulation of PH are mostly dependent on the breaking of the symmetry of the system composed of the incident light and the regular structure particles, which inevitably limits the research of PH. In this work, the PH of the irregular particles is demonstrated with the help of a structure-constrained function (SCF). By varying the coefficients of the function, characteristic parameters of the PH, such as the bending angle, the effective length and the bending direction, can be effectively modulated. Meanwhile, high-quality PHs with a bending angle of up to 46∘ and an effective length of up to 11.90λ, as well as PHs with three bends, can be obtained using this method. The formation mechanism of the PH is revealed by simulating the distribution of the field intensity with the finite element method and analyzing with ray optics. This is the first time that we introduce a function into the investigation of PH, paving a new way for a more interesting exploration of PH.
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Konoplev G, Agafonova D, Bakhchova L, Mukhin N, Kurachkina M, Schmidt MP, Verlov N, Sidorov A, Oseev A, Stepanova O, Kozyrev A, Dmitriev A, Hirsch S. Label-Free Physical Techniques and Methodologies for Proteins Detection in Microfluidic Biosensor Structures. Biomedicines 2022; 10:207. [PMID: 35203416 PMCID: PMC8868674 DOI: 10.3390/biomedicines10020207] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/01/2022] [Accepted: 01/11/2022] [Indexed: 12/25/2022] Open
Abstract
Proteins in biological fluids (blood, urine, cerebrospinal fluid) are important biomarkers of various pathological conditions. Protein biomarkers detection and quantification have been proven to be an indispensable diagnostic tool in clinical practice. There is a growing tendency towards using portable diagnostic biosensor devices for point-of-care (POC) analysis based on microfluidic technology as an alternative to conventional laboratory protein assays. In contrast to universally accepted analytical methods involving protein labeling, label-free approaches often allow the development of biosensors with minimal requirements for sample preparation by omitting expensive labelling reagents. The aim of the present work is to review the variety of physical label-free techniques of protein detection and characterization which are suitable for application in micro-fluidic structures and analyze the technological and material aspects of label-free biosensors that implement these methods. The most widely used optical and impedance spectroscopy techniques: absorption, fluorescence, surface plasmon resonance, Raman scattering, and interferometry, as well as new trends in photonics are reviewed. The challenges of materials selection, surfaces tailoring in microfluidic structures, and enhancement of the sensitivity and miniaturization of biosensor systems are discussed. The review provides an overview for current advances and future trends in microfluidics integrated technologies for label-free protein biomarkers detection and discusses existing challenges and a way towards novel solutions.
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Affiliation(s)
- Georgii Konoplev
- Faculty of Electronics, Saint Petersburg Electrotechnical University “LETI”, 197376 Saint Petersburg, Russia; (D.A.); (A.S.); (O.S.); (A.K.)
| | - Darina Agafonova
- Faculty of Electronics, Saint Petersburg Electrotechnical University “LETI”, 197376 Saint Petersburg, Russia; (D.A.); (A.S.); (O.S.); (A.K.)
| | - Liubov Bakhchova
- Institute for Automation Technology, Otto-von-Guericke-University Magdeburg, 39106 Magdeburg, Germany;
| | - Nikolay Mukhin
- Faculty of Electronics, Saint Petersburg Electrotechnical University “LETI”, 197376 Saint Petersburg, Russia; (D.A.); (A.S.); (O.S.); (A.K.)
- Department of Engineering, University of Applied Sciences Brandenburg, 14770 Brandenburg an der Havel, Germany; (M.K.); (S.H.)
| | - Marharyta Kurachkina
- Department of Engineering, University of Applied Sciences Brandenburg, 14770 Brandenburg an der Havel, Germany; (M.K.); (S.H.)
| | - Marc-Peter Schmidt
- Faculty of Electrical Engineering, University of Applied Sciences Dresden, 01069 Dresden, Germany;
| | - Nikolay Verlov
- Molecular and Radiation Biophysics Division, Petersburg Nuclear Physics Institute Named by B.P. Konstantinov, National Research Centre Kurchatov Institute, 188300 Gatchina, Russia;
| | - Alexander Sidorov
- Faculty of Electronics, Saint Petersburg Electrotechnical University “LETI”, 197376 Saint Petersburg, Russia; (D.A.); (A.S.); (O.S.); (A.K.)
- Fuculty of Photonics, ITMO University, 197101 Saint Petersburg, Russia
| | - Aleksandr Oseev
- FEMTO-ST Institute, CNRS UMR-6174, University Bourgogne Franche-Comté, 25000 Besançon, France;
| | - Oksana Stepanova
- Faculty of Electronics, Saint Petersburg Electrotechnical University “LETI”, 197376 Saint Petersburg, Russia; (D.A.); (A.S.); (O.S.); (A.K.)
| | - Andrey Kozyrev
- Faculty of Electronics, Saint Petersburg Electrotechnical University “LETI”, 197376 Saint Petersburg, Russia; (D.A.); (A.S.); (O.S.); (A.K.)
| | - Alexander Dmitriev
- Department of Ecological Physiology, Federal State Budgetary Scientific Institution “Institute of Experimental Medicine” (FSBSI “IEM”), 197376 Saint Petersburg, Russia;
| | - Soeren Hirsch
- Department of Engineering, University of Applied Sciences Brandenburg, 14770 Brandenburg an der Havel, Germany; (M.K.); (S.H.)
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Characteristic parameters of photonic nanojets of single dielectric microspheres illuminated by focused broadband radiation. Sci Rep 2022; 12:173. [PMID: 34996911 PMCID: PMC8741904 DOI: 10.1038/s41598-021-03610-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 11/30/2021] [Indexed: 11/09/2022] Open
Abstract
Herein, we report the theoretical investigation on the photonic nanojets (PNJs) of single dielectric microspheres illuminated by focused broadband radiation (polychromatic light) from a Halogen lamp, supercontinuum source, light-emitting diode, and Hg arc lamp. The role of incident beam waist, refractive index of the surrounding medium, and radius of the microsphere on the characteristic parameters such as the electric field intensity enhancement, effective width, and length of the PNJ is studied. Interestingly, the characteristic parameters of the PNJs of solid microspheres obtained for the above-mentioned broadband radiation sources are found close to those observed for the focused monochromatic radiation of wavelengths which are near to the central wavelengths of the sources. Moreover, the characteristic parameters of PNJs of the core-shell microspheres of different thicknesses (t) illuminated by polychromatic radiation from most commonly used sources such as Halogen and Hg arc lamps are studied. For each t value, a suitable wavelength of monochromatic radiation has been found to generate the PNJ with characteristic parameters which are close to those obtained in the case of polychromatic radiation. We believe that the analytical theory and the theoretical simulations reported here would be useful for researchers who work in the fields such as PNJ assisted photoacoustic spectroscopy, white light nanoscopy, low-coherence phase-shifting interference microscopy, and Mirau interferometry.
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Abstract
During the last decade, new unusual physical phenomena have been discovered in studying the optics of dielectric mesoscale particles of an arbitrary three-dimensional shape with the Mie size parameter near 10 (q~10). The paper provides a brief overview of these phenomena from optics to terahertz, plasmonic and acoustic ranges. The different particle configurations (isolated, regular or Janus) are discussed, and the possible applications of such mesoscale structures are briefly reviewed herein in relation to the field enhancement, nanoparticle manipulation and super-resolution imaging. The number of interesting applications indicates the appearance of a new promising scientific direction in optics, terahertz and acoustic ranges, and plasmonics. This paper presents the authors’ approach to these problems.
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Zihan Y, Sylvain L. Whispering gallery mode resonance contribution in photonic nanojet simulation. OPTICS EXPRESS 2021; 29:39249-39255. [PMID: 34809293 DOI: 10.1364/oe.443546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 10/23/2021] [Indexed: 06/13/2023]
Abstract
A photonic nanojet is a highly localized electromagnetic propagative beam in the shadow side of a dielectric micro-particle. This concept was introduced in a famous paper by Chen et al. in 2004. Since then, this paper has inspired numerous original developments all over the world. Several years later, we point out that whispering gallery mode (WGM) resonances, not always brought out by FDTD simulations, can coexist in addition to the photonic jet. Such WGM resonances drastically change the distribution of the electric field. Through subsequent simulations, we show how these WGM resonances are highly sensitive to parameter changes. Particle diameter change smaller than 1 nm is enough to make them disappear. This may explain why sometimes they are not observed by FDTD simulations despite high resolution spatial mesh.
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Li C, Liu X, Du X, Yang T, Li Q, Jin L. Preparation and optical properties of nanostructure thin films. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-021-01930-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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