Related papers: Fractal superconducting nanowires detect infrared single photons with 84% system detection efficiency, 1.02 polarization sensitivity, and 20.8 ps timing resolution

Fractal superconducting nanowires detect infrared single photons with 84% system detection efficiency, 1.02 polarization sensitivity, and 20.8 ps timing resolution

URL: http://arxiv.org/abs/2012.06730v2
Date: Thu, 31 Mar 2022 07:04:30 GMT
Title: Fractal superconducting nanowires detect infrared single photons with 84% system detection efficiency, 1.02 polarization sensitivity, and 20.8 ps timing resolution
Authors: Yun Meng, Kai Zou, Nan Hu, Liang Xu, Xiaojian Lan, Stephan Steinhauer, Samuel Gyger, Val Zwiller, Xiaolong Hu
Abstract summary: superconducting nanowire single-photon detectors (SNSPDs) Novel device structure of SNSPDs, allowing for operation in the visible, near, and mid-infrared spectral ranges. Paved the way for polarization-insensitive single-photon detection with high SDE and high timing resolution.
Score: 9.401126858233535
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: The near-unity system detection efficiency (SDE) and excellent timing resolution of superconducting nanowire single-photon detectors (SNSPDs), combined with their other merits, have enabled many classical and quantum photonic applications. However, the prevalent design based on meandering nanowires makes SDE dependent on the polarization states of the incident photons; for unpolarized light, the major merit of high SDE would get compromised, which could be detrimental for photon-starved applications. Here, we create SNSPDs with an arced fractal geometry that almost completely eliminates this polarization dependence of the SDE, and we experimentally demonstrate 84$\pm$3$\%$ SDE, 1.02$^{+0.06}_{-0.02}$ polarization sensitivity at the wavelength of 1575 nm, and 20.8 ps timing jitter in a 0.1-W closed-cycle Gifford-McMahon cryocooler, at the base temperature of 2.0 K. This demonstration provides a novel, practical device structure of SNSPDs, allowing for operation in the visible, near-, and mid-infrared spectral ranges, and paves the way for polarization-insensitive single-photon detection with high SDE and high timing resolution

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