Fractal superconducting nanowire single-photon detectors working in dual bands and their applications in free-space and underwater hybrid LIDAR

Autor:	Kai Zou, Zifan Hao, Yifan Feng, Yun Meng, Nan Hu, Stephan Steinhauer, Samuel Gyger, Val Zwiller, Xiaolong Hu
Rok vydání:	2023
Předmět:	Atomic and Molecular Physics and Optics
Zdroj:	Optics Letters. 48:415
ISSN:	1539-4794 0146-9592
DOI:	10.1364/ol.481226
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::12400636e1434e25bf35d60333a23619 https://doi.org/10.1364/ol.481226 Zobrazit plný text záznamu