Abstract

We demonstrate a fiber-coupled fractal superconducting nanowire single-photon detector (SNSPD) system with minimum polarization dependence of detection efficiency. Its system detection efficiency (SDE) was maximized at the wavelength of 1540 nm, which was measured to be 91 ± 4%; furthermore, we observed the second local maximum of SDE at the wavelength of 520 nm, which was measured to be 61 ± 2%. This dual-band feature of SDE was due to the enhancement of the optical absorptance by two longitudinal resonance modes of the micro-cavity. By using high SDE with minimum polarization dependence in these two bands, we implemented a hybrid LIDAR for imaging the remote objects in free space and under water.

© 2023 Optica Publishing Group

Fractal superconducting nanowire single-photon detectors with reduced polarization sensitivity

Xiaoming Chi, Kai Zou, Chao Gu, Julien Zichi, Yuhao Cheng, Nan Hu, Xiaojian Lan, Shufan Chen, Zuzeng Lin, Val Zwiller, and Xiaolong Hu
Opt. Lett. 43(20) 5017-5020 (2018)

Micro-pulse polarization lidar at 1.5  μm using a single superconducting nanowire single-photon detector

Jiawei Qiu, Haiyun Xia, Mingjia Shangguan, Xiankang Dou, Manyi Li, Chong Wang, Xiang Shang, Shengfu Lin, and Jianjiang Liu
Opt. Lett. 42(21) 4454-4457 (2017)

Fractal superconducting nanowire avalanche photodetector at 1550 nm with 60% system detection efficiency and 1.05 polarization sensitivity

Yun Meng, Kai Zou, Nan Hu, Xiaojian Lan, Liang Xu, Julien Zichi, Stephan Steinhauer, Val Zwiller, and Xiaolong Hu
Opt. Lett. 45(2) 471-474 (2020)

Dual-frequency Doppler lidar for wind detection with a superconducting nanowire single-photon detector

Mingjia Shangguan, Haiyun Xia, Chong Wang, Jiawei Qiu, Shengfu Lin, Xiankang Dou, Qiang Zhang, and Jian-Wei Pan
Opt. Lett. 42(18) 3541-3544 (2017)

Full-Stokes polarimetric measurements and imaging using a fractal superconducting nanowire single-photon detector

Nan Hu, Yun Meng, Kai Zou, Yifan Feng, Zifan Hao, Stephan Steinhauer, Samuel Gyger, Val Zwiller, and Xiaolong Hu
Optica 9(4) 346-351 (2022)