Cylindrical vector beam multiplexer/demultiplexer using off-axis polarization control  

作　　者：Shuqing Chen Zhiqiang Xie Huapeng Ye Xinrou Wang Zhenghao Guo Yanliang He Ying Li Xiaocong Yuan Dianyuan Fan 

机构地区：[1]Institute of Microscale Optoelectronics,Shenzhen University,518060 Shenzhen,China [2]Guangdong Provincial Key Laboratory of Optical Information Materials and Technology&Institute of Electronic Paper Displays,South China Academy of Advanced Optoelectronics,South China Normal University,510006 Guangzhou,China

出　　处：《Light(Science & Applications)》2021年第12期2360-2368,共9页光（科学与应用)（英文版）

基　　金：This project was funded by National Natural Science Foundation of China(61805149,62101334,12047539,U1701661);Guangdong Basic and Applied Basic Research Foundation(2020A1515011392,2020A1515110572,2019A1515111153,2021A1515011762);Shenzhen Fundamental Research Program(JCYJ20200109144001800,JCYJ20180507182035270);Science and Technology Project of Shenzhen(GJHZ20180928160407303);Shenzhen Universities Stabilization Support Program(SZWD2021013);Shenzhen Excellent Scientific and Technological Innovative Talent Training Program(RCBS20200714114818094);China Postdoctoral Science Foundation(2020M682867).

摘　　要：The emergence of cylindrical vector beam(CVB)multiplexing has opened new avenues for high-capacity optical communication.Although several configurations have been developed to couple/separate CVBs,the CVB multiplexer/demultiplexer remains elusive due to lack of effective off-axis polarization control technologies.Here we report a straightforward approach to realize off-axis polarization control for CVB multiplexing/demultiplexing based on a metal–dielectric–metal metasurface.We show that the left-and right-handed circularly polarized(LHCP/RHCP)components of CVBs are independently modulated via spin-to-orbit interactions by the properly designed metasurface,and then simultaneously multiplexed and demultiplexed due to the reversibility of light path and the conservation of vector mode.We also show that the proposed multiplexers/demultiplexers are broadband(from 1310 to 1625 nm)and compatible with wavelength-division-multiplexing.As a proof of concept,we successfully demonstrate a four-channel CVB multiplexing communication,combining wavelength-division-multiplexing and polarization-division-multiplexing with a transmission rate of 1.56 Tbit/s and a bit-error-rate of 10^(−6) at the receive power of−21.6 dBm.This study paves the way for CVB multiplexing/demultiplexing and may benefit high-capacity CVB communication.

关 键 词：POLARIZATION BEAM PROPERLY 

分 类 号：TN91[电子电信—通信与信息系统]