Design of Fabrication-Tolerant and Compact Waveguide Superconducting Single-Photon Detector Based on TM<sub>0</sub> Mode Absorption

Design of Fabrication-Tolerant and Compact Waveguide Superconducting Single-Photon Detector Based on TM<sub>0</sub> Mode Absorption

A TM<sub>0</sub> mode coupled travelling wave SNSPD based on SOI platform is designed. The light propagating in this device can achieve high-efficiency mode conversion from TE<sub>0</sub> mode to TM<sub>0</sub> mode and then absorbed by NbN nanowires on top of the...

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Bibliographic Details
Main Authors: Yang Li, Lue Tao, Yingxuan Zhao, Haiyang Huang, Xiaojuan She, Han Liao, Junbo Zhu, Zijian Zhu, Rui Huang, Xiang Liu, Fuwan Gan
Format: Article
Language:English
Published: IEEE 2021-01-01
Series:IEEE Photonics Journal
Subjects:
Travelling wave SNSPD
integrated quantum nanophotonic circuits
silicon-photonics
polarization rotator
Online Access:https://ieeexplore.ieee.org/document/9447954/
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Summary:A TM<sub>0</sub> mode coupled travelling wave SNSPD based on SOI platform is designed. The light propagating in this device can achieve high-efficiency mode conversion from TE<sub>0</sub> mode to TM<sub>0</sub> mode and then absorbed by NbN nanowires on top of the waveguide. Thanks to the TM<sub>0</sub> mode coupled detection, the length of NbN nanowire that is needed to achieve a close-to-unity photon absorption is cut down to an extremely short level of &#x223C;5&#x00A0;&#x03BC;m. Meanwhile, this TM<sub>0</sub> mode coupled travelling wave SNSPD is very robust against fabrication errors compared with TE<sub>0</sub> coupled SNSPD.
ISSN:1943-0655

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