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Hou M, Chen Y, Li J, Yi F. Single 5-centimeter-aperture metalens enabled intelligent lightweight mid-infrared thermographic camera. SCIENCE ADVANCES 2024; 10:eado4847. [PMID: 38968354 PMCID: PMC11225786 DOI: 10.1126/sciadv.ado4847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 06/04/2024] [Indexed: 07/07/2024]
Abstract
Existing mid-infrared thermographic cameras rely on a stack of refractive lenses, resulting in bulky and heavy imaging systems that restrict their broader utility. Here, we demonstrate a lightweight metalens-based thermographic camera (MTC) enabled by a single 0.5-mm-thick, 3.7-g-weight, flat, and mass-producible metalens. The large aperture size (5 cm) of our metalens, when combined with an uncooled focal plane array, enables thermal imaging at distances of tens of meters. By computationally removing the veiling glare, our MTC realizes the temperature mapping with an inaccuracy of less than ±0.7% within the range of 35° to 700°C and shows exceptional environmental adaptability. Furthermore, by using intelligent algorithms and spectral filtering, our uncooled MTC enables visualization and quantification of the SF6 gas leakage at a long distance of 5 m, with a remarkable minimum detectable leak rate of 0.2 sccm. Our work opens the door to the lightweight and multifunctional intelligent thermal imaging systems.
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Affiliation(s)
- Mingming Hou
- School of Optical and Electronic Information and Wuhan National Research Center for Optoelectronics (WNLO), Huazhong University of Science and Technology, Hubei, Wuhan 430074, China
| | - Yan Chen
- School of Optical and Electronic Information and Wuhan National Research Center for Optoelectronics (WNLO), Huazhong University of Science and Technology, Hubei, Wuhan 430074, China
| | - Junyu Li
- IRay Technology Co. Ltd., Yantai 264006, China
| | - Fei Yi
- School of Optical and Electronic Information and Wuhan National Research Center for Optoelectronics (WNLO), Huazhong University of Science and Technology, Hubei, Wuhan 430074, China
- Optics Valley Laboratory, Hubei 430074, China
- Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen 518000, China
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2
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Hou E, Liang Z, Shi X, Yang F, Dong Y, Wu Z, Dai R, Liu H, Li S. All-dielectric six-foci metalens for infrared polarization detection based on Stokes space. OPTICS EXPRESS 2023; 31:40018-40028. [PMID: 38041312 DOI: 10.1364/oe.504936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 10/23/2023] [Indexed: 12/03/2023]
Abstract
The detection technology of infrared polarization has gained significant attention due to its ability to provide better identification and obtain more information about the target. In this paper, based on the expression of the full polarization state in Stokes space, we designed micro-nano metasurface functional arrays to calculate the polarization state of the incident light by reading the Stokes parameters (a set of parameters that describe the polarization state). Metalens with linear and circular polarization-dependent functions are designed based on the propagation and geometric phases of the dielectric Si meta-atoms in the infrared band, respectively. The device exhibits a high polarization extinction ratio. The influence of incident angle on polarization-dependent metalens is discussed, and the analysis of incident angle is of great significance for the practical application. An infrared six-foci metalens is proposed, each corresponding to the Poincaré sphere's coordinate component (a graphical polarization state method). By matching the six polarization components of the incident light and the Stokes parameters, the polarization detection function can be realized by calculating the polarization state of the incident light. There is a slight error between the theoretical value and the calculated value of the unit coordinate component of the Stokes parameters. At the same time, the intensity distribution of different incident light polarization azimuth angles and ellipticity angles on the focal plane agrees with the theory. The advantage of the device is that the polarization state of the incident light can be directly calculated without passing through other components. The six-foci metalens have potential applications in polarization detection and imaging, space remote sensing, etc.
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3
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Zhou Y, Fan JA. Polychromatic metasurfaces for complete control of phase and polarization in the mid-infrared. LIGHT, SCIENCE & APPLICATIONS 2023; 12:249. [PMID: 37805594 PMCID: PMC10560284 DOI: 10.1038/s41377-023-01257-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/09/2023]
Abstract
Multifunctional metasurfaces based on wavelength-decoupled supercells are experimentally demonstrated, enabling new regimes of optical control for arbitrary orthogonal polarizations at different wavelengths.
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Affiliation(s)
- You Zhou
- Department of Electrical Engineering, Stanford University, Stanford, CA, 94305, USA.
| | - Jonathan A Fan
- Department of Electrical Engineering, Stanford University, Stanford, CA, 94305, USA.
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4
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Lim SWD, Park JS, Kazakov D, Spägele CM, Dorrah AH, Meretska ML, Capasso F. Point singularity array with metasurfaces. Nat Commun 2023; 14:3237. [PMID: 37277345 PMCID: PMC10241946 DOI: 10.1038/s41467-023-39072-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Accepted: 05/23/2023] [Indexed: 06/07/2023] Open
Abstract
Phase singularities are loci of darkness surrounded by monochromatic light in a scalar field, with applications in optical trapping, super-resolution imaging, and structured light-matter interactions. Although 1D singular structures, like optical vortices, are common due to their robust topological properties, uncommon 0D (point) and 2D (sheet) singularities can be generated by wavefront-shaping devices like metasurfaces. With the design flexibility of metasurfaces, we deterministically position ten identical point singularities using a single illumination source. The phasefront is inverse-designed using phase-gradient maximization with an automatically-differentiable propagator and produces tight longitudinal intensity confinement. The array is experimentally realized with a TiO2 metasurface. One possible application is blue-detuned neutral atom trap arrays, for which this field would enforce 3D confinement and a potential depth around 0.22 mK per watt of incident laser power. We show that metasurface-enabled point singularity engineering may significantly simplify and miniaturize the optical architecture for super-resolution microscopes and dark traps.
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Affiliation(s)
- Soon Wei Daniel Lim
- Harvard John A. Paulson School of Engineering and Applied Sciences, 9 Oxford Street, Cambridge, MA, 02138, USA.
| | - Joon-Suh Park
- Harvard John A. Paulson School of Engineering and Applied Sciences, 9 Oxford Street, Cambridge, MA, 02138, USA
- Nanophotonics Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Dmitry Kazakov
- Harvard John A. Paulson School of Engineering and Applied Sciences, 9 Oxford Street, Cambridge, MA, 02138, USA
| | - Christina M Spägele
- Harvard John A. Paulson School of Engineering and Applied Sciences, 9 Oxford Street, Cambridge, MA, 02138, USA
| | - Ahmed H Dorrah
- Harvard John A. Paulson School of Engineering and Applied Sciences, 9 Oxford Street, Cambridge, MA, 02138, USA
| | - Maryna L Meretska
- Harvard John A. Paulson School of Engineering and Applied Sciences, 9 Oxford Street, Cambridge, MA, 02138, USA
| | - Federico Capasso
- Harvard John A. Paulson School of Engineering and Applied Sciences, 9 Oxford Street, Cambridge, MA, 02138, USA
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5
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Ossiander M, Meretska ML, Hampel HK, Lim SWD, Knefz N, Jauk T, Capasso F, Schultze M. Extreme ultraviolet metalens by vacuum guiding. Science 2023; 380:59-63. [PMID: 37023199 DOI: 10.1126/science.adg6881] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
Abstract
Extreme ultraviolet (EUV) radiation is a key technology for material science, attosecond metrology, and lithography. Here, we experimentally demonstrate metasurfaces as a superior way to focus EUV light. These devices exploit the fact that holes in a silicon membrane have a considerably larger refractive index than the surrounding material and efficiently vacuum-guide light with a wavelength of ~50 nanometers. This allows the transmission phase at the nanoscale to be controlled by the hole diameter. We fabricated an EUV metalens with a 10-millimeter focal length that supports numerical apertures of up to 0.05 and used it to focus ultrashort EUV light bursts generated by high-harmonic generation down to a 0.7-micrometer waist. Our approach introduces the vast light-shaping possibilities provided by dielectric metasurfaces to a spectral regime that lacks materials for transmissive optics.
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Affiliation(s)
- Marcus Ossiander
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Maryna Leonidivna Meretska
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Hana Kristin Hampel
- Institute of Experimental Physics, Graz University of Technology, 8010 Graz, Austria
| | - Soon Wei Daniel Lim
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Nico Knefz
- Institute of Experimental Physics, Graz University of Technology, 8010 Graz, Austria
| | - Thomas Jauk
- Institute of Experimental Physics, Graz University of Technology, 8010 Graz, Austria
| | - Federico Capasso
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Martin Schultze
- Institute of Experimental Physics, Graz University of Technology, 8010 Graz, Austria
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6
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Bao Y, Nan F, Yan J, Yang X, Qiu CW, Li B. Observation of full-parameter Jones matrix in bilayer metasurface. Nat Commun 2022; 13:7550. [PMID: 36477161 PMCID: PMC9729203 DOI: 10.1038/s41467-022-35313-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 11/23/2022] [Indexed: 12/12/2022] Open
Abstract
Metasurfaces, artificial 2D structures, have been widely used for the design of various functionalities in optics. Jones matrix, a 2×2 matrix with eight parameters, provides the most complete characterization of the metasurface structures in linear optics, and the number of free parameters (i.e., degrees of freedom, DOFs) in the Jones matrix determines the limit to what functionalities we can realize. Great efforts have been made to continuously expand the number of DOFs, and a maximal number of six has been achieved recently. However, the realization of the ultimate goal with eight DOFs (full free parameters) has been proven as a great challenge so far. Here, we show that by cascading two layer metasurfaces and utilizing the gradient descent optimization algorithm, a spatially varying Jones matrix with eight DOFs is constructed and verified numerically and experimentally in optical frequencies. Such ultimate control unlocks opportunities to design optical functionalities that are unattainable with previously known methodologies and may find wide potential applications in optical fields.
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Affiliation(s)
- Yanjun Bao
- grid.258164.c0000 0004 1790 3548Institute of Nanophotonics, Jinan University, Guangzhou, 511443 China
| | - Fan Nan
- grid.258164.c0000 0004 1790 3548Institute of Nanophotonics, Jinan University, Guangzhou, 511443 China
| | - Jiahao Yan
- grid.258164.c0000 0004 1790 3548Institute of Nanophotonics, Jinan University, Guangzhou, 511443 China
| | - Xianguang Yang
- grid.258164.c0000 0004 1790 3548Institute of Nanophotonics, Jinan University, Guangzhou, 511443 China
| | - Cheng-Wei Qiu
- grid.4280.e0000 0001 2180 6431Department of Electrical and Computer Engineering, National University of Singapore, Singapore, 117583 Singapore
| | - Baojun Li
- grid.258164.c0000 0004 1790 3548Institute of Nanophotonics, Jinan University, Guangzhou, 511443 China
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7
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Wu G, Si L, Xu H, Niu R, Zhuang Y, Sun H, Ding J. Phase-to-pattern inverse design for a fast realization of a functional metasurface by combining a deep neural network and a genetic algorithm. OPTICS EXPRESS 2022; 30:45612-45623. [PMID: 36522964 DOI: 10.1364/oe.478084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 11/04/2022] [Indexed: 06/17/2023]
Abstract
Metasurface provides an unprecedented means to manipulate electromagnetic waves within a two-dimensional planar structure. Traditionally, the design of meta-atom follows the pattern-to-phase paradigm, which requires a time-consuming brute-forcing process. In this work, we present a fast inverse meta-atom design method for the phase-to-pattern mapping by combining the deep neural network (DNN) and genetic algorithm (GA). The trained classification DNN with an accuracy of 92% controls the population generated by the GA within an arbitrary preset small phase range, which could greatly enhance the optimization efficiency with less iterations and a higher accuracy. As proof-of-concept demonstrations, two reflective functional metasurfaces including an orbital angular momentum generator and a metalens have been numerically investigated. The simulated results agree very well with the design goals. In addition, the metalens is also experimentally validated. The proposed method could pave a new avenue for the fast design of the meta-atoms and functional meta-devices.
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8
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Xiao X, Zhao Y, Ye X, Chen C, Lu X, Rong Y, Deng J, Li G, Zhu S, Li T. Large-scale achromatic flat lens by light frequency-domain coherence optimization. LIGHT, SCIENCE & APPLICATIONS 2022; 11:323. [PMID: 36357364 PMCID: PMC9649754 DOI: 10.1038/s41377-022-01024-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/18/2022] [Accepted: 10/24/2022] [Indexed: 05/31/2023]
Abstract
Flat lenses, including metalens and diffractive lens, have attracted increasing attention due to their ability to miniaturize the imaging devices. However, realizing a large scale achromatic flat lens with high performance still remains a big challenge. Here, we developed a new framework in designing achromatic multi-level diffractive lenses by light coherence optimization, which enables the implementation of large-scale flat lenses under non-ideal conditions. As results, a series achromatic polymer lenses with diameter from 1 to 10 mm are successfully designed and fabricated. The subsequent optical characterizations substantially validate our theoretical framework and show relatively good performance of the centimeter-scale achromatic multi-level diffractive lenses with a super broad bandwidth in optical wavelengths (400-1100 nm). After comparing with conventional refractive lens, this achromatic lens shows significant advantages in white-light imaging performance, implying a new strategy in developing practical planar optical devices.
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Affiliation(s)
- Xingjian Xiao
- National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulations, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China
| | - Yunwei Zhao
- National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulations, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China
| | - Xin Ye
- National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulations, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China
| | - Chen Chen
- National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulations, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China
| | - Xinmou Lu
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yansen Rong
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Junhong Deng
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Guixin Li
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China.
| | - Shining Zhu
- National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulations, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China
| | - Tao Li
- National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulations, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China.
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9
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Si W, Hu Z, Lan D, Zhou Y, Li W. Robust Achromatic All-Dielectric Metalens for Infrared Detection in Intelligent Inspection. SENSORS (BASEL, SWITZERLAND) 2022; 22:6590. [PMID: 36081049 PMCID: PMC9460807 DOI: 10.3390/s22176590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/23/2022] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
Metalens has the advantages of high design freedom, light weight and easy integration, thus provides a powerful platform for infrared detection. Here, we numerically demonstrated a broadband achromatic infrared all-dielectric metalens over a continuous 800 nm bandwidth, with strong environmental adaptability in air, water and oil. By building a database with multiple 2π phase coverage and anomalous dispersions, optimizing the corrected required phase profiles and designing the sizes and spatial distributions of silicon nanopillars, we numerically realized the design of broadband achromatic metalens. The simulation results of the designed metalens show nearly constant focal lengths and diffraction-limited focal spots over the continuous range of wavelengths from 4.0 to 4.8 μm, indicating the ability of the designed metalens to detect thermal signals over a temperature range from various fault points. Further simulation results show that the metalens maintains good focusing performance under the environment of water or oil. This work may facilitate the application of metalens in ultra-compact infrared detectors for power grid faults detection.
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Affiliation(s)
- Wenrong Si
- State Grid Shanghai Electrical Power Research Institute, Shanghai 200437, China
| | - Zhengyong Hu
- State Grid Shanghai Electrical Power Research Institute, Shanghai 200437, China
| | - Dun Lan
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yi Zhou
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Li
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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10
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Zhou Y, Gan F, Wang R, Lan D, Shang X, Li W. Doublet Metalens with Simultaneous Chromatic and Monochromatic Correction in the Mid-Infrared. SENSORS (BASEL, SWITZERLAND) 2022; 22:6175. [PMID: 36015937 PMCID: PMC9414931 DOI: 10.3390/s22166175] [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: 07/19/2022] [Revised: 08/10/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
Metalenses provide a powerful paradigm for mid-infrared (MIR) imaging and detection while keeping the optical system compact. However, the design of MIR metalenses simultaneously correcting chromatic aberration and off-axis monochromatic aberration remains challenging. Here, we propose an MIR doublet metalens composed of a silicon aperture metalens and a silicon focusing metalens separated by a fused silica substrate. By performing ray-tracing optimization and particle-swarm optimization, we optimized the required phase profiles as well as the sizes and spatial distributions of silicon nanopillars of the doublet metalens. Simulation results showed that the MIR doublet metalens simultaneously achieved chromatic and off-axis monochromatic aberration reduction, realizing a continuous 400 nm bandwidth and 20° field-of-view (FOV). Thanks to its planar configuration, this metalens is suitable for integration with CMOS image sensor to achieve MIR imaging and detection, which has potential application in troubleshooting and intelligent inspection of power grids. This work may facilitate the practical application of metalens-integrated micro/nanosensors in intelligent energy.
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Affiliation(s)
- Yi Zhou
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fengyuan Gan
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ruxue Wang
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dun Lan
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiangshuo Shang
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Li
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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11
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Pan M, Fu Y, Zheng M, Chen H, Zang Y, Duan H, Li Q, Qiu M, Hu Y. Dielectric metalens for miniaturized imaging systems: progress and challenges. LIGHT, SCIENCE & APPLICATIONS 2022; 11:195. [PMID: 35764608 PMCID: PMC9240015 DOI: 10.1038/s41377-022-00885-7] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 06/03/2022] [Accepted: 06/10/2022] [Indexed: 05/25/2023]
Abstract
Lightweight, miniaturized optical imaging systems are vastly anticipated in these fields of aerospace exploration, industrial vision, consumer electronics, and medical imaging. However, conventional optical techniques are intricate to downscale as refractive lenses mostly rely on phase accumulation. Metalens, composed of subwavelength nanostructures that locally control light waves, offers a disruptive path for small-scale imaging systems. Recent advances in the design and nanofabrication of dielectric metalenses have led to some high-performance practical optical systems. This review outlines the exciting developments in the aforementioned area whilst highlighting the challenges of using dielectric metalenses to replace conventional optics in miniature optical systems. After a brief introduction to the fundamental physics of dielectric metalenses, the progress and challenges in terms of the typical performances are introduced. The supplementary discussion on the common challenges hindering further development is also presented, including the limitations of the conventional design methods, difficulties in scaling up, and device integration. Furthermore, the potential approaches to address the existing challenges are also deliberated.
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Affiliation(s)
- Meiyan Pan
- Jihua Laboratory, Foshan, 528200, China.
| | - Yifei Fu
- Jihua Laboratory, Foshan, 528200, China
| | | | - Hao Chen
- Jihua Laboratory, Foshan, 528200, China
| | | | - Huigao Duan
- College of Mechanical and Vehicle Engineering, Hunan University, Changsha, 410082, China
- Greater Bay Area Institute for Innovation, Hunan University, Guangzhou, 511300, Guangdong Province, China
| | - Qiang Li
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Min Qiu
- Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, 18 Shilongshan Road, Hangzhou, 310024, China
- Institute of Advanced Technology, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou, 310024, China
| | - Yueqiang Hu
- College of Mechanical and Vehicle Engineering, Hunan University, Changsha, 410082, China.
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12
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Panov AV. Optical Kerr nonlinearity of dielectric nanohole array metasurface in proximity to anapole state. OPTICS LETTERS 2022; 47:2866-2869. [PMID: 35648950 DOI: 10.1364/ol.459989] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 05/10/2022] [Indexed: 05/28/2023]
Abstract
Metasurfaces have attracted a great deal of attention from researchers due to their prominent optical properties. In particular, metasurfaces may consist of structures possessing optical anapole resonances with strong field confinement and substantially suppressed scattering. As a result, such nanostructures display enhanced nonlinear optical properties. In this paper by means of three-dimensional finite-difference time-domain simulations, the ability of anapole modes in high-index dielectric metasurfaces with circular nanopores is shown. In the vicinity of the anapole state, the effective optical Kerr nonlinearity increases by orders of magnitude. Simultaneously, the optical transmission of the metasurface can reach high values up to unity.
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13
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Affiliation(s)
- Yuri Kivshar
- Nonlinear Physics Center, Research School of Physics Australian National University, Canberra, Australian Capital Territory 2601, Australia
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14
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Zhou K, Wang B, Tang S, Gao Y, Liu S, Sheng Y, Chen J, Dai S, Shen X. Mid-infrared biomimetic moth-eye-shaped polarization-maintaining and angle-insensitive metalens. OPTICS EXPRESS 2022; 30:12048-12060. [PMID: 35473134 DOI: 10.1364/oe.454610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 03/04/2022] [Indexed: 06/14/2023]
Abstract
Metalenses can potentially reduce the size and complexity of existing cameras, displays, and other optical devices, owing to their capability of flexible manipulation of the polarization, amplitude, and phase of light. However, metalenses capable of maintaining polarization and broadband wavefront shaping under arbitrarily polarized excitation have not been studied. In this study, we present the first demonstration of a biomimetic moth-eye-shaped metalens for polarization-maintaining, broadband and angle-insensitive focusing under an arbitrarily polarized excitation in the mid-infrared waveband (3.1-8.0 µm). Modulation and focusing efficiencies of 92% and 90%, respectively, were achieved. Moreover, a bifocal moth-eye-shaped metalens operating at normal and oblique incidences was realized. Compared to previously reported metalenses, the one proposed in this study exhibited a better focusing under oblique incidence, ensuring light transmission as effectively as a traditional lens. This study paves the way for the development of polarization-maintaining, broadband, and angle-insensitive microscale optical devices and imaging systems.
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