Spin-orbital angular momentum degeneracy breaking in nanoplasmonic metachain

被引：0

作者：

Chen, Jia ^{[1
]}

Lv, Jiangtao ^{[2
]}

Zhang, Rongxin ^{[3
]}

Si, Guangyuan ^{[4
]}

Shen, Mengzhe ^{[5
]}

Wang, Dapeng ^{[1
,5
]}

机构：

[1] Xiamen Univ, Natl Model Microelect Coll, Sch Elect Sci & Engn, Xiamen 361005, Peoples R China

[2] Northeastern Univ Qinhuangdao, Hebei Prov Key Lab Micronano Precis Opt Sensing &, Qinhuangdao 066004, Peoples R China

[3] Xiamen Univ, Key Lab Underwater Acoust Commun & Marine Informat, Minist Educ, Xiamen 361005, Peoples R China

[4] Melbourne Ctr Nanofabricat, Victorian Node Australian Natl Fabricat Facil, Clayton, Vic 3168, Australia

[5] BGI Res, Inst Biointelligence Technol, Shenzhen 518083, Peoples R China

来源：

OPTICS LETTERS | 2024年 / 49卷 / 02期

基金：

中国国家自然科学基金;

关键词：

PHASE; LIGHT;

D O I：

10.1364/OL.506824

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The spin and orbital angular momentum (namely SAM and OAM) mode division provides a promising solution to surmount exhausted available degrees of freedom in conventional optical communications. Nevertheless, SAM and OAM are often subjected to the degeneracy of total angular momentum (AM) because they both have integer variables of quantum eigenstates, which inevitably brings about the shortcomings specific to limited signal channels and multiplexing cross talk. Herein, we present a nanoplasmonic metachain that can discriminatively couple any input SAM and OAM components to an extrinsic orbital AM, corresponding to the chirality and topological charge of incident light. Importantly, the unambiguous measurement has a prominent advantage of detecting the arbitrary AM component rather than the total AM. The miniature metadevice offers the possibility of harnessing AM division on chip or in fiber and holds great promise to delve the spin-orbit interactions for topological photonics and quantum cryptography. (c) 2024

引用

页码：198 / 201

页数：4

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