Optical metasurfaces,which consist of subwavelength scale meta-atoms,represent a novel platform to manipulate the polarization and phase of light.The optical performance of metasurfaces heavily relies on the quality o...Optical metasurfaces,which consist of subwavelength scale meta-atoms,represent a novel platform to manipulate the polarization and phase of light.The optical performance of metasurfaces heavily relies on the quality of nanofabrication.Retrieving the Jones matrix of an imperfect metasurface optical element is highly desirable.We show that this can be realized by decomposing the generalized Jones matrix of a meta-atom into two parallel ones,which correspond to the ideal matrix and a phase retardation.To experimentally verify this concept,we designed and fabricated metasurface polarizers,which consist of geometric phase-controlled dielectric meta-atoms.By scanning the polarization states of the incident and transmitted light,we are able to extract the coefficients of the two parallel matrices of a metasurface polarizer.Based on the results of the Jones matrix decomposition,we also demonstrated polarization image encryption and spin-selective optical holography.The proposed Jones matrix retrieval protocol may have important applications in computational imaging,optical computing,optical communications,and so on.展开更多
Dynamic control of Airy beam has been attracting scientists’attention due to its potential applications in imaging,optical manipulation and laser manufacturing.However,traditional way of dynamic tuning of free space ...Dynamic control of Airy beam has been attracting scientists’attention due to its potential applications in imaging,optical manipulation and laser manufacturing.However,traditional way of dynamic tuning of free space Airy beam usually requires bulky optics and will inevitably limit its practical applications.To solve this issue,a recent work proposes to use a compact meta-device which consists of two cascaded dielectric metasurfaces working in the visible regime.展开更多
基金supported by the National Key Technologies R&D Program of China (Grant No.2022YFA1404301)the Zhangjiang Laboratory,the National Natural Science Foundation of China (Grant Nos.91950114 and 12161141010)+2 种基金the Guangdong Provincial Innovation and Entrepreneurship Project (Grant No.2017ZT07C071)the Guangdong Provincial Key Laboratory Program (Grant No.2021B1212040001)the Natural Science Foundation of Shenzhen Innovation Commission (Grant No.JCYJ20200109140808088).
文摘Optical metasurfaces,which consist of subwavelength scale meta-atoms,represent a novel platform to manipulate the polarization and phase of light.The optical performance of metasurfaces heavily relies on the quality of nanofabrication.Retrieving the Jones matrix of an imperfect metasurface optical element is highly desirable.We show that this can be realized by decomposing the generalized Jones matrix of a meta-atom into two parallel ones,which correspond to the ideal matrix and a phase retardation.To experimentally verify this concept,we designed and fabricated metasurface polarizers,which consist of geometric phase-controlled dielectric meta-atoms.By scanning the polarization states of the incident and transmitted light,we are able to extract the coefficients of the two parallel matrices of a metasurface polarizer.Based on the results of the Jones matrix decomposition,we also demonstrated polarization image encryption and spin-selective optical holography.The proposed Jones matrix retrieval protocol may have important applications in computational imaging,optical computing,optical communications,and so on.
文摘Dynamic control of Airy beam has been attracting scientists’attention due to its potential applications in imaging,optical manipulation and laser manufacturing.However,traditional way of dynamic tuning of free space Airy beam usually requires bulky optics and will inevitably limit its practical applications.To solve this issue,a recent work proposes to use a compact meta-device which consists of two cascaded dielectric metasurfaces working in the visible regime.
