Abstract

We demonstrate superconducting nanowire single-photon detectors (SNSPDs) based on a fractal design of the nanowires to reduce the polarization sensitivity of detection efficiency. We patterned niobium titanium nitride thin films into Peano curves with a linewidth of 100 nm and integrated the nanowires with optical microcavities to enhance their optical absorption. At a base temperature of 2.6 K, the fractal SNSPD exhibited a polarization-maximum device efficiency of 67% and a polarization-minimum device efficiency of 61% at a wavelength of 1550 nm. Therefore, the polarization sensitivity, defined as their ratio, was 1.1, lower than the polarization sensitivity of the SNSPDs in the meander design. The reduced polarization sensitivity of the detector could be maintained for higher-order spatial modes in multimode optical fibers and could tolerate misalignment between the optical mode and the detector. This fractal design is applicable to both amorphous and polycrystalline materials that are commonly used for making SNSPDs.

© 2018 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Design of efficient superconducting nanowire single photon detectors with high polarization sensitivity for polarimetric imaging

Fan Zheng, Xudong Tao, Mengmeng Yang, Guanghao Zhu, Biaobing Jin, Lin Kang, Weiwei Xu, Jian Chen, and Peiheng Wu
J. Opt. Soc. Am. B 33(11) 2256-2264 (2016)

Microfiber-coupled superconducting nanowire single-photon detector for near-infrared wavelengths

Lixing You, Junjie Wu, Yingxin Xu, Xintong Hou, Wei Fang, Hao Li, Weijun Zhang, Lu Zhang, Xiaoyu Liu, Limin Tong, Zhen Wang, and Xiaoming Xie
Opt. Express 25(25) 31221-31229 (2017)

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 OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA 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 OSA member, or as an authorized user of your institution.

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

Figures (4)

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

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

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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