Abstract

Superconducting nanowire (nanostrip) single-photon detectors (SNSPDs) have shown unprecedented detection efficiency and timing properties, but simultaneously achieving polarization-insensitive high detection efficiency, low dark-count rate (DCR), fast speed, and low timing jitter remains a challenge. Here we report on our design, fabrication, and characterization of a cascaded superconducting avalanche photodetector composed of 40 nm wide NbTiN nanowires patterned into fractal curves. At the base temperature of 2.7 K, the device exhibits $60 \pm 3 \%$ system detection efficiency at the wavelength of 1550 nm, 1.05 polarization sensitivity, 220 cps DCR, 4 ns recovery time, and 45 ps timing jitter. This Letter not only demonstrates these combined properties on a single detector that was unobtainable previously, but also shows that that current-crowding effect remarkably permits decent internal detection efficiency. These counter-intuitive results expand the understanding pertaining to the device physics of SNSPDs.

© 2020 Optical Society of America

Full Article  |  PDF Article
More Like This
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)

Sixteen-channel fiber array-coupled superconducting single-photon detector array with average system detection efficiency over 60% at telecom wavelength

Wei-Jun Zhang, Guang-Zhao Xu, Li-Xing You, Cheng-Jun Zhang, Hao Huang, Xin Ou, Xing-Qu Sun, Jia-Min Xiong, Hao Li, Zhen Wang, and Xiao-Ming Xie
Opt. Lett. 46(5) 1049-1052 (2021)

Superconducting nanowire single-photon detectors with 98% system detection efficiency at 1550 nm

Dileep V. Reddy, Robert R. Nerem, Sae Woo Nam, Richard P. Mirin, and Varun B. Verma
Optica 7(12) 1649-1653 (2020)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (2)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics