| Autor: |
Qin J; School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China., Jiang S; School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China., Wang Z; Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China.; MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai 200092, China.; Shanghai Institute of Intelligent Science and Technology, Tongji University, Shanghai 200092, China.; Shanghai Frontiers Science Center of Digital Optics, Shanghai 200092, China., Cheng X; Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China.; MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai 200092, China.; Shanghai Institute of Intelligent Science and Technology, Tongji University, Shanghai 200092, China.; Shanghai Frontiers Science Center of Digital Optics, Shanghai 200092, China., Li B; Institute of Nanophotonics, Jinan University, Guangzhou 511443, China., Shi Y; Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China.; MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai 200092, China.; Shanghai Institute of Intelligent Science and Technology, Tongji University, Shanghai 200092, China.; Shanghai Frontiers Science Center of Digital Optics, Shanghai 200092, China., Tsai DP; Department of Electrical Engineering, City University of Hong Kong Tat Chee Avenue, Kowloon 999077, Hong Kong, China., Liu AQ; School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore., Huang W; Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences(CAS), Suzhou 215123, China., Zhu W; School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China. |
| Abstrakt: |
Metasurfaces are 2D artificial materials consisting of arrays of metamolecules, which are exquisitely designed to manipulate light in terms of amplitude, phase, and polarization state with spatial resolutions at the subwavelength scale. Traditional micro/nano-optical sensors (MNOSs) pursue high sensitivity through strongly localized optical fields based on diffractive and refractive optics, microcavities, and interferometers. Although detections of ultra-low concentrations of analytes have already been demonstrated, the label-free sensing and recognition of complex and unknown samples remain challenging, requiring multiple readouts from sensors, e.g ., refractive index, absorption/emission spectrum, chirality, etc . Additionally, the reliability of detecting large, inhomogeneous biosamples may be compromised by the limited near-field sensing area from the localization of light. Here, we review recent advances in metasurface-based MNOSs and compare them with counterparts using micro-optics from aspects of physics, working principles, and applications. By virtue of underlying the physics and design flexibilities of metasurfaces, MNOSs have now been endowed with superb performances and advanced functionalities, leading toward highly integrated smart sensing platforms. |
