Nano-thick SiO_(2) channel for subwavelength plasmonic orbital angular momentum mode transmission  

作　　者：Zhishen Zhang Xiaobo Heng Shuai Gao Li Zhang Fei Lin Weicheng Chen Jiulin Gan 张智深;衡小波;高帅;张莉;林飞;陈伟成;甘久林

机构地区：[1]Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology,School of Physics and Optoelectronic Engineering,Foshan University,Foshan 528225,China [2]GBA Branch of Aerospace Information Research Institute,Chinese Academy of Sciences,Guangzhou 510700,China [3]State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials,South China University of Technology,Guangzhou 510640,China

出　　处：《Chinese Optics Letters》2025年第1期127-133,共7页中国光学快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.62305057);the Guangdong Basic and Applied Basic Research Foundation(Nos.2021B1515020095,2021A1515110919,and 2019A1515110243);the Research Fund of Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology(No.2020B1212030010)。

摘　　要：Orbital angular momentum(OAM)waveguides are critical for multi-channel photonic-on-chip applications.However,current large-mode-area waveguides pose a challenge for OAM device miniaturization.Here,a novel hybrid plasmonic waveguide is theoretically proposed to decrease the OAM mode area by two orders of magnitude.Benefiting from the Ag-As_(2)S_(3)-SiO_(2)-As_(2)S_(3)-Ag five-layer cylindrical structure,the guided OAM mode realizes a larger figure of merit of 88.Based on this waveguide,an OAM coupler with a record-breaking small footprint(0.68μm×5.7μm)is designed.The proposed waveguide enables subwavelength OAM light transmission,which provides a key building block for high-density OAM photonics circuits.

关 键 词：orbital angular momentum waveguide hybrid plasmonic waveguide directional coupler 

分 类 号：TN256[电子电信—物理电子学]