文献类型：期刊文献

英文题名：Wavelength-adaptive optical angular momentum recognizer via programmable soft materials

作者：Sun, Pei-Zhi[1,2];Wang, Xiao-Qian[1];Wang, Yi-Fei[1,2];Yuan, Cong-Long[1,2];Shen, Dong[1];Zheng, Zhi-Gang[1,2]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：11

期号：16

起止页码：5307

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY C

收录：;EI(收录号：20231613900331);WOS:【SCI-EXPANDED(收录号:WOS:000963725600001)】；

基金：The authors acknowledge the support from the National Key Research and Development Program of China (SQ2022YFA1200117), the National Science Foundation of China (grant no. 61822504, 51873060, 62035008 and 62275081), the Innovation Program of Shanghai Municipal Education Commission, the Scientific Committee of Shanghai (2021-01-07-00-02-E00107), and the "Shuguang Program" of Shanghai Education Development Foundation and Shanghai Municipal Education Commission (21SG29).

语种：英文

外文关键词：Angular momentum - Crystal structure - Gaussian beams - Liquid crystals - Optical communication

摘要：The orthogonal spin angular momentum (SAM) and orbital angular momentum (OAM) of light, which together expand into multiple dimensions in photonics, need to be identified. However, their recognition with dynamic modulability and broadband wavelength adaptability remains challenging. Herein, we achieve the simultaneous one-step identification of both SAM and OAM, based on a liquid crystal (LC) recognizer with a programmed geometric phase structure. By retrieving the propagation direction and exclusive non-vortex Gaussian beam of the resultant diffraction array, the SAM and OAM of impinged light can be precisely recognized, and the superimposed states involving multiple SAMs and OAMs can also be identified through demultiplexing. Thanks to the unique stimuli-responsiveness of LCs, the recognizer can be promptly switched on/off as required, and dynamically adapt to any wavelength in an extremely broad range covering the visible and NIR bands. Inspired by the concept of an optical logic gate matrix, an information processing system is established by encoding the diffraction matrices with some specific information. We anticipate that this work will be promising to give fascinating dynamic responsiveness and spectral adaptability to integrated optical communications and motivate research into the new scenario of information processing loading on angular momenta.