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Liu M, Zhao W, Wang Y, Huo P, Zhang H, Lu YQ, Xu T. Achromatic and Coma-Corrected Hybrid Meta-Optics for High-Performance Thermal Imaging. NANO LETTERS 2024; 24:7609-7615. [PMID: 38861682 DOI: 10.1021/acs.nanolett.4c01218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
Long-wave infrared (LWIR) imaging, or thermal imaging, is widely applied in night vision and security monitoring. However, the widespread use of LWIR imagers is impeded by their bulky size, considerable weight, and high cost. While flat meta-optics present a potential solution to these limitations, existing pure LWIR meta-optics face constraints such as severe chromatic or coma aberrations. Here, we introduce an approach utilizing large-scale hybrid meta-optics to address these challenges and demonstrate the achromatic, coma-corrected, and polarization-insensitive thermal imaging. The hybrid metalens doublet is composed of a metasurface corrector and a refractive lens, featuring a full field-of-view angle surpassing 20° within the 8-12 μm wavelength range. Employing this hybrid metalens doublet, we showcase high-performance thermal imaging capabilities both indoors and outdoors, effectively capturing ambient thermal radiation. The proposed hybrid metalens doublet holds considerable promise for advancing miniaturized, lightweight, and cost-effective LWIR optical imaging systems.
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Affiliation(s)
- Mingze Liu
- National Laboratory of Solid-State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
- Key Laboratory of Intelligent Optical Sensing and Manipulation, Nanjing University, Nanjing 210093, China
| | - Weixing Zhao
- National Laboratory of Solid-State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
- Key Laboratory of Intelligent Optical Sensing and Manipulation, Nanjing University, Nanjing 210093, China
| | - Yilin Wang
- National Laboratory of Solid-State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
- Key Laboratory of Intelligent Optical Sensing and Manipulation, Nanjing University, Nanjing 210093, China
| | - Pengcheng Huo
- National Laboratory of Solid-State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
- Key Laboratory of Intelligent Optical Sensing and Manipulation, Nanjing University, Nanjing 210093, China
| | - Hui Zhang
- National Laboratory of Solid-State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
- Key Laboratory of Intelligent Optical Sensing and Manipulation, Nanjing University, Nanjing 210093, China
| | - Yan-Qing Lu
- National Laboratory of Solid-State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
- Key Laboratory of Intelligent Optical Sensing and Manipulation, Nanjing University, Nanjing 210093, China
| | - Ting Xu
- National Laboratory of Solid-State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
- Key Laboratory of Intelligent Optical Sensing and Manipulation, Nanjing University, Nanjing 210093, China
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Tang M, Sun C, Chen Q, Ding W, Yang J, Zhang Y, Lu J. Broadband wavelength designable achromatic grating based on a cholesteric liquid crystal template. OPTICS EXPRESS 2024; 32:20449-20458. [PMID: 38859426 DOI: 10.1364/oe.517638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 05/01/2024] [Indexed: 06/12/2024]
Abstract
Liquid crystal (LC) gratings have played important roles in light field control due to the advantages of being lightweight, low cost, having no moving parts, and low power consumption. However, the chromatic aberration limits the bandwidth of the LC device and affects the efficiency of the grating. To solve the chromatic aberration issue, a broadband wavelength designable achromatic grating is proposed. Different grating structures are integrated into a single-layer templated cholesteric liquid crystal (CLC) device, and the achromatic diffraction wavelength of the grating can be freely designed from the visible spectral region to the infrared range within the Bragg reflection band of the CLCs. The diffraction intensity of different orders can be changed with the electric field applied to meet the need for dynamic modulation. This grating shows suitable potential applications in optical communication and displays.
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Pan CF, Wang H, Wang H, S PN, Ruan Q, Wredh S, Ke Y, Chan JYE, Zhang W, Qiu CW, Yang JK. 3D-printed multilayer structures for high-numerical aperture achromatic metalenses. SCIENCE ADVANCES 2023; 9:eadj9262. [PMID: 38117894 PMCID: PMC10732525 DOI: 10.1126/sciadv.adj9262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 11/21/2023] [Indexed: 12/22/2023]
Abstract
Flat optics consisting of nanostructures of high-refractive index materials produce lenses with thin form factors that tend to operate only at specific wavelengths. Recent attempts to achieve achromatic lenses uncover a trade-off between the numerical aperture (NA) and bandwidth, which limits performance. Here, we propose a new approach to design high-NA, broadband, and polarization-insensitive multilayer achromatic metalenses (MAMs). We combine topology optimization and full-wave simulations to inversely design MAMs and fabricate the structures in low-refractive index materials by two-photon polymerization lithography. MAMs measuring 20 μm in diameter operating in the visible range of 400 to 800 nm with 0.5 and 0.7 NA were achieved with efficiencies of up to 42%. We demonstrate broadband imaging performance of the fabricated MAM under white light and RGB narrowband illuminations. These results highlight the potential of the 3D-printed multilayer structures for realizing broadband and multifunctional meta-devices with inverse design.
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Affiliation(s)
- Cheng-Feng Pan
- Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576, Singapore
| | - Hao Wang
- Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore
- College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China
- Greater Bay Area Institute for Innovation, Hunan University, Guangzhou 511300, China
| | - Hongtao Wang
- Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576, Singapore
| | - Parvathi Nair S
- Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore
- Institute of Materials Research and Engineering, A*STAR (Agency for Science Technology and Research), Singapore 138634, Singapore
| | - Qifeng Ruan
- Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Simon Wredh
- Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore
| | - Yujie Ke
- Institute of Materials Research and Engineering, A*STAR (Agency for Science Technology and Research), Singapore 138634, Singapore
| | - John You En Chan
- Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore
| | - Wang Zhang
- Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore
| | - Cheng-Wei Qiu
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576, Singapore
| | - Joel K. W. Yang
- Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore
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Nalbant HC, Balli F, Yelboğa T, Eren A, Sözak A. Transmission optimized LWIR metalens. APPLIED OPTICS 2022; 61:9946-9950. [PMID: 36606826 DOI: 10.1364/ao.469805] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 10/28/2022] [Indexed: 06/17/2023]
Abstract
Thermal imaging at the infrared wavelength regime has long been applied to different areas such as agriculture and defense industries. Metasurfaces, 2D engineered ultra-thin structures, have attracted much attention due to their compact size, superior performance, and different functionalities at optical frequencies. This work details the design and fabrication of high transmission metalenses operating at the long-wave infrared (LWIR) spectrum. We minimize the reflection losses through anti-reflection coating (ARC) while maintaining the full wavefront control at the central wavelength 9.07 µm. Our unit cell structure provides an average transmission of 97.5%. We experimentally verify our results and show that the fabricated metalenses perform diffraction-limited imaging at the design wavelength.
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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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Liu Y, Chen L, Zhou C, Guo K, Wang X, Hong Y, Yang X, Wei Z, Liu H. Theoretical Study on Generation of Multidimensional Focused and Vector Vortex Beams via All-Dielectric Spin-Multiplexed Metasurface. NANOMATERIALS 2022; 12:nano12040580. [PMID: 35214909 PMCID: PMC8880084 DOI: 10.3390/nano12040580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 02/01/2022] [Accepted: 02/04/2022] [Indexed: 12/04/2022]
Abstract
The optical vortex (OV) beams characterized by orbital angular momentum (OAM) possess ubiquitous applications in optical communication and nanoparticle manipulation. Particularly, the vortex vector beams are important in classical physics and quantum sciences. Here, based on an all-dielectric transmission metasurface platform, we demonstrate a spin-multiplexed metadevice combining propagation phase and Pancharatnam–Berry (PB) phase. By utilizing a phase-only modulation method, the metadevice can generate spin-dependent and multidimensional focused optical vortex (FOV) under the orthogonally circularly polarized incident light, and it can successfully realize the multiplexed of the above-mentioned FOVs for linearly polarized light. Meanwhile, the superposition of multiple OAM states can also produce vector vortex beams with different modes. Additionally, the evolution process of the electric field intensity profile is presented after the resultant vector vortex beams through a horizontal linear polarization. This work paves an innovative way for generating structured beams, and it provides promising opportunities for advanced applications in optical data storage, optical micromanipulation, and data communication.
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Affiliation(s)
- Yue Liu
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, China; (Y.L.); (L.C.); (C.Z.); (K.G.); (X.W.); (Y.H.); (X.Y.); (Z.W.)
- School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
| | - Li Chen
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, China; (Y.L.); (L.C.); (C.Z.); (K.G.); (X.W.); (Y.H.); (X.Y.); (Z.W.)
- School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
| | - Chengxin Zhou
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, China; (Y.L.); (L.C.); (C.Z.); (K.G.); (X.W.); (Y.H.); (X.Y.); (Z.W.)
- School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
| | - Kuangling Guo
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, China; (Y.L.); (L.C.); (C.Z.); (K.G.); (X.W.); (Y.H.); (X.Y.); (Z.W.)
- School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
| | - Xiaoyi Wang
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, China; (Y.L.); (L.C.); (C.Z.); (K.G.); (X.W.); (Y.H.); (X.Y.); (Z.W.)
- School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
| | - Yuhan Hong
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, China; (Y.L.); (L.C.); (C.Z.); (K.G.); (X.W.); (Y.H.); (X.Y.); (Z.W.)
- School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
| | - Xiangbo Yang
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, China; (Y.L.); (L.C.); (C.Z.); (K.G.); (X.W.); (Y.H.); (X.Y.); (Z.W.)
- School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
| | - Zhongchao Wei
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, China; (Y.L.); (L.C.); (C.Z.); (K.G.); (X.W.); (Y.H.); (X.Y.); (Z.W.)
- School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
| | - Hongzhan Liu
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, China; (Y.L.); (L.C.); (C.Z.); (K.G.); (X.W.); (Y.H.); (X.Y.); (Z.W.)
- School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
- Correspondence:
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