Multispectral and low-filling-factor superconducting nanowire single photon detector with high absorption efficiency

We propose a superconducting nanowire single photon detector (SNSPD) that can work efficiently at two target wavelengths and has a significant improvement in the counting rate due to the low-filling-factor nanowires in the silicon slots and the silver reflector. Numerical simulations show that the a...

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Veröffentlicht in:AIP advances 2020-08, Vol.10 (8), p.085111-085111-5, Article 085111
Hauptverfasser: Li, Dezhi, Liu, Xiangyuan, Jiao, Rongzhen
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Sprache:eng
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Zusammenfassung:We propose a superconducting nanowire single photon detector (SNSPD) that can work efficiently at two target wavelengths and has a significant improvement in the counting rate due to the low-filling-factor nanowires in the silicon slots and the silver reflector. Numerical simulations show that the absorption efficiency can be over 90% at a single wavelength, whether the incident light wavelength is 1550 nm or 1064 nm, and over 80% when the SNSPD is designed to work at both wavelengths. In addition, the reset time is about 24% of the conventional SNSPDs. Our work presents a design for fabricating faster, larger-area, and multispectral SNSPDs with a high efficiency, which can be applied in applications such as quantum optics communication and multiwavelength sensing.
ISSN:2158-3226
2158-3226
DOI:10.1063/5.0006057