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Chiral Photonic Circuits for Deterministic Spin Transfer
Author(s) -
Xiao Shan,
Wu Shiyao,
Xie Xin,
Yang Jingnan,
Wei Wenqi,
Shi Shushu,
Song Feilong,
Dang Jianchen,
Sun Sibai,
Yang Longlong,
Wang Yunuan,
Yan Sai,
Zuo Zhanchun,
Wang Ting,
Zhang Jianjun,
Jin Kuijuan,
Xu Xiulai
Publication year - 2021
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.202100009
Subject(s) - photonics , physics , quantum optics , quantum network , quantum information , quantum , optoelectronics , quantum mechanics
Chiral quantum optics has attracted considerable interest in the field of quantum information science. Exploiting the spin‐polarization properties of quantum emitters and engineering rational photonic nanostructures has made it possible to transform information from spin to path encoding. Here, compact chiral photonic circuits with deterministic circularly polarized chiral routing and beamsplitting are demonstrated using two laterally adjacent waveguides coupled with quantum dots. Chiral routing arises from the electromagnetic field chirality in waveguide, and beamsplitting is obtained via the evanescent field coupling. The spin‐ and position‐dependent directional spontaneous emission are achieved by spatially selective micro‐photoluminescence measurements, with a chiral contrast of up to 0.84 in the chiral photonic circuits. This makes a significant advancement for broadening the application scenarios of chiral quantum optics and developing scalable quantum photonic networks.