Chiral photonic circuits for deterministic spin transfer
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.
Cite
@article{arxiv.2106.00325,
title = {Chiral photonic circuits for deterministic spin transfer},
author = {Shan Xiao and Shiyao Wu and Xin Xie and Jingnan Yang and Wenqi Wei and Shushu Shi and Feilong Song and Sibai Sun and Jianchen Dang and Longlong Yang and Yunuan Wang and Sai Yan and Zhanchun Zuo and Ting Wang and Jianjun Zhang and Kuijuan Jin and Xiulai Xu},
journal= {arXiv preprint arXiv:2106.00325},
year = {2021}
}
Comments
19 pages, 5 figures