Chiral Photonic Circuits for Deterministic Spin Transfer. Issue 9 (8th July 2021)

• Record Type: Journal Article
• Authors: 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
• Is Part Of: Laser & photonics reviews. Volume 15:Issue 9(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-07-08
• Subjects: chiral photonic circuits -- quantum dots -- spin–photon interfaces; Lasers -- Periodicals; Photonics -- Periodicals; Lasers -- Périodiques; Photonique -- Périodiques; 621.36
• DOI: 10.1002/lpor.202100009
• Languages: English
• ISSNs: 1863-8880

Abstract

Abstract: 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. Abstract : Deterministic circularly polarized chiral routing and beam splitting in a compact chiral photonic circuit embedded with single quantum dots are reported on. Spin and position‐dependent chiral coupling of quantum dot transitions, with a chiral contrast of up to 0.84, is demonstrated. The chiral photonic circuits offer the potential for developing on‐chip functionalized optical elements and chiral quantum networks.