Electrically tunable planar liquid-crystal singlets for simultaneous spectrometry and imaging  

作　　者：Zhou Zhou Yiheng Zhang Yingxin Xie Tian Huang Zile Li Peng Chen Yan-qing Lu Shaohua Yu Shuang Zhang Guoxing Zheng 

机构地区：[1]Electronic Information School,and School of Microelectronics,Wuhan University,Wuhan 430072,China [2]NUS Graduate School,National University of Singapore,Singapore 119077,Singapore [3]Department of Electrical and Computer Engineering,National University of Singapore,Singapore 117583,Singapore [4]National Laboratory of Solid State Microstructures,Key Laboratory of Intelligent Optical Sensing and Manipulation,and College of Engineering and Applied Sciences,Nanjing University,Nanjing 210093,China [5]Peng Cheng Laboratory,Shenzhen 518055,China [6]New Cornerstone Science Laboratory,Department of Physics,University of Hong Kong,Hong Kong,China [7]Department of Electrical and Electronic Engineering,University of Hong Kong,Hong Kong,China [8]Wuhan Institute of Quantum Technology,Wuhan 430206,China

出　　处：《Light(Science & Applications)》2024年第11期2589-2598,共10页光（科学与应用)（英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant Nos.2023YFB2804700,2021YFA1202000 and 2021YFE0205800);National Natural Science Foundation of China(Grant Nos.12174292,62222507,and 62175101);Natural Science Foundation of Jiangsu Province(No.BK20212004);Fundamental Research Funds for the Central Universities(2042024kf1005).

摘　　要：Conventional hyperspectral cameras cascade lenses and spectrometers to acquire the spectral datacube,which forms the fundamental framework for hyperspectral imaging.However,this cascading framework involves tradeoffs among spectral and imaging performances when the system is driven toward miniaturization.Here,we propose a spectral singlet lens that unifies optical imaging and computational spectrometry functions,enabling the creation of minimalist,miniaturized and high-performance hyperspectral cameras.As a paradigm,we capitalize on planar liquid crystal optics to implement the proposed framework,with each liquid-crystal unit cell acting as both phase modulator and electrically tunable spectral filter.Experiments with various targets show that the resulting millimeter-scale hyperspectral camera exhibits both high spectral fidelity(>95%)and high spatial resolutions(~1.7 times the diffraction limit).The proposed“two-in-one”framework can resolve the conflicts between spectral and imaging resolutions,which paves a practical pathway for advancing hyperspectral imaging systems toward miniaturization and portable applications.

关 键 词：CRYSTAL PLANAR SINGLET 

分 类 号：O43[机械工程—光学工程]