Characterization of superconducting nanowire single-photon detector with artificial constrictions

Statistical studies on the performance of different superconducting nanowire single-photon detectors (SNSPDs) on one chip suggested that random constrictions existed in the nanowire that were barely registered by scanning electron microscopy. With the aid of advanced e-beam lithography, artificial g...

Full description

Saved in:
Bibliographic Details
Published in:AIP advances 2014-06, Vol.4 (6), p.067114-067114-7
Main Authors: Zhang, Ling, You, Lixing, Liu, Dengkuan, Zhang, Weijun, Zhang, Lu, Liu, Xiaoyu, Wu, Junjie, He, Yuhao, Lv, Chaolin, Wang, Zhen, Xie, Xiaoming
Format: Article
Language:English
Subjects:
Constrictions
DETECTION
EFFICIENCY
Electron beams
HYPOTHESIS
Inductance
MATERIALS SCIENCE
NANOSCIENCE AND NANOTECHNOLOGY
Nanowires
PHOTONS
QUANTUM WIRES
SCANNING ELECTRON MICROSCOPY
Superconductivity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Statistical studies on the performance of different superconducting nanowire single-photon detectors (SNSPDs) on one chip suggested that random constrictions existed in the nanowire that were barely registered by scanning electron microscopy. With the aid of advanced e-beam lithography, artificial geometric constrictions were fabricated on SNSPDs as well as single nanowires. In this way, we studied the influence of artificial constrictions on SNSPDs in a straight forward manner. By introducing artificial constrictions with different wire widths in single nanowires, we concluded that the dark counts of SNSPDs originate from a single constriction. Further introducing artificial constrictions in SNSPDs, we studied the relationship between detection efficiency and kinetic inductance and the bias current, confirming the hypothesis that constrictions exist in SNSPDs.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4881981