Controllable Spin-Resolved Photon Emission Enhanced by Slow-Light Mode
  in Photonic Crystal Waveguides on Chip

Shi, Shushu; Xiao, Shan; Yang, Jingnan; Li, Shulun; Xie, Xin; Dang, Jianchen; Yang, Longlong; Dai, Danjie; Fu, Bowen; Yan, Sai; Yuan, Yu; Zhu, Rui; Li, Bei-Bei; Zuo, Zhanchun; Wang, Can; Ni, Haiqiao; Niu, Zhichuan; Jin, Kuijuan; Gong, Qihuang; Xu, Xiulai

doi:10.48550/arXiv.2302.11399

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Controllable Spin-Resolved Photon Emission Enhanced by Slow-Light Mode in Photonic Crystal Waveguides on Chip

Version 2 2023-06-08, 13:03

Version 1 2023-03-23, 16:01

preprint

posted on 2023-06-08, 13:03 authored by Shushu Shi, Shan Xiao, Jingnan Yang, Shulun Li, Xin Xie, Jianchen Dang, Longlong Yang, Danjie Dai, Bowen Fu, Sai Yan, Yu Yuan, Rui Zhu, Bei-Bei Li, Zhanchun Zuo, Can Wang, Haiqiao Ni, Zhichuan Niu, Kuijuan Jin, Qihuang Gong, Xiulai Xu

We report the slow-light enhanced spin-resolved in-plane emission from a single quantum dot (QD) in a photonic crystal waveguide (PCW). The slow light dispersions in PCWs are designed to match the emission wavelengths of single QDs. The resonance between two spin states emitted from a single QD and a slow light mode of a waveguide is investigated under a magnetic field with Faraday configuration. Two spin states of a single QD experience different degrees of enhancement as their emission wavelengths are shifted by combining diamagnetic and Zeeman effects with an optical excitation power control. A circular polarization degree up to 0.81 is achieved by changing the off-resonant excitation power. Strongly polarized photon emission enhanced by a slow light mode shows great potential to attain controllable spin-resolved photon sources for integrated optical quantum networks on chip.