Design of Fabrication-Tolerant and Compact Waveguide Superconducting Single-Photon Detector Based on TM0 Mode Absorption

A TM 0 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 0 mode to TM 0 mode and then absorbed by NbN nanowires on top of the waveguide. Thanks to the TM 0 mode coupled detection, the length...

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Bibliographic Details
Published in:IEEE photonics journal 2021-06, Vol.13 (3), p.1-9
Main Authors: Li, Yang, Tao, Lue, Zhao, Yingxuan, Huang, Haiyang, She, Xiaojuan, Liao, Han, Zhu, Junbo, Zhu, Zijian, Huang, Rui, Liu, Xiang, Gan, Fuwan
Format: Article
Language:English
Subjects:
Absorption
Coupled modes
Detectors
integrated quantum nanophotonic circuits
Nanowires
Niobium nitride
Optical surface waves
Optical waveguides
Photon absorption
Photonics
Photons
polarization rotator
Silicon
silicon-photonics
Traveling waves
Travelling wave SNSPD
Wave propagation
Waveguides
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Description
Summary:A TM 0 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 0 mode to TM 0 mode and then absorbed by NbN nanowires on top of the waveguide. Thanks to the TM 0 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 ∼5 μm. Meanwhile, this TM 0 mode coupled travelling wave SNSPD is very robust against fabrication errors compared with TE 0 coupled SNSPD.
ISSN:1943-0655
1943-0647
DOI:10.1109/JPHOT.2021.3086868