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arXiv · 2302.11399

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

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
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Abstract

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.

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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. 2023-02-22. Controllable Spin-Resolved Photon Emission Enhanced by Slow-Light Mode in Photonic Crystal Waveguides on Chip. https://doi.org/10.1364/oe.483244

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