Sub-millikelvin-resolved superconducting nanowire single-photon detector operates with sub-pW infrared radiation power
Year: 2024
Type: article
Abstract: The noise equivalent temperature difference (NETD) indicates the minimum temperature difference resolvable by using an infrared detector. The lower the NETD, the better the sensor can register small temperature differences. In this work, we proposed a strategy to achieve a high temperature resolution using a superconducting nanowire single-photon detector (SNSPD) with ultra-high sensitivity. We deduced the model for calculating the NETD of a photon-counting-type detector and applied it to our SNSPD-based set-up. Experimentally, we obtained an NETD as low as 0.65 mK, which is limited by the background radiation of the environment, and the required infrared radiation power is calculated to be <1 pW. Furthermore, the intrinsic NETD of this SNSPD is estimated to be <0.1 mK. This work demonstrated a sub-mK temperature resolution when using the SNSPD, paving the way for future remote infrared thermal imaging with high temperature resolution.
Source: National Science Review
DOI: 10.1093/nsr/nwae319
Authors: Qi Chen, Fei Zhou, Chen Wei, Yue Dai, Haiyong Gan, Labao Zhang, Hao Wang, Hang Yuan, Haochen Li, Jingrou Tan, Guojin Feng, Xuecou Tu, Xiaoqing Jia, Qingyuan Zhao, Lin Kang, Jian Chen, Peiheng Wu
Institutions: Nanjing University, National Institute of Metrology
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,100
Funders: National Natural Science Foundation of China, Government of Jiangsu Province, Natural Science Foundation of Jiangsu Province, Nanjing University, Priority Academic Program Development of Jiangsu Higher Education Institutions, Jiangsu Provincial Key Laboratory of Advanced Manipulating Technique of Electromagnetic Wave
OpenAlex ID: W4402664674