Design of NbN superconducting nanowire single photon detectors with enhanced infrared photon detection efficiency

We present overview of achieved results on 4H-SiC avalanche photodiodes (APDs) and arrays. Cost-effective solar-blind optical filter allows achieving high solar photon rejection ratio of more than 106 in combination with more than 40% single photon detection efficiency at 266nm. Three iterations of devices were fabricated and evaluated to compare their optical and electrical properties. Dark count rates and single photon detection efficiencies are the main characteristics compared for these three iterations of device designs.

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An efficient performance evaluation modeling tool for SNSPD used in QKD systems

International Journal of Quantum Information ◽

10.1142/s021974991950059x ◽

2019 ◽

Vol 17 (07) ◽

pp. 1950059

Author(s):

Adil F. Mushatet ◽

Shelan K. Tawfeeq

Keyword(s):

Detection Efficiency ◽

Single Photon ◽

Single Photon Detection ◽

Photon Detectors ◽

Photon Detection ◽

Efficient Performance ◽

Single Photon Detectors ◽

Dark Counts ◽

Photon Detection Efficiency ◽

The Impact

Single-photon detection concept is the most crucial and often difficult factor to determine the performance of quantum key distribution (QKD) systems. One solution to facilitate understanding this concept is to create a virtual environment for modeling, analyzing, and investigating the performance of single photon detectors. In this paper, a simulator for superconducting single photon detectors with time domain visualizer and configurable parameters is presented. The widely used ID281SNSPD in the QKD area was theoretically modeled in terms of pulse analysis, the impact of biasing current and the temperature on the dark counts rate and single photon-detection efficiency and influence of the number of photons per pulse on the single photon-detection efficiency. The simulated results were in good agreement with the theoretical results and the simulator demonstrated its adaptability.

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Design of High Speed and High Efficiency Single-Photon Detectors Using Silicon Avalanche Photodiodes

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.705.168 ◽

2016 ◽

Vol 705 ◽

pp. 168-173

Author(s):

Nan Zhou ◽

Miao Qing Zhuang ◽

Hao Liang

Keyword(s):

High Speed ◽

High Efficiency ◽

Detection Efficiency ◽

Single Photon ◽

Avalanche Photodiodes ◽

Single Photon Detection ◽

Photon Detectors ◽

Photon Detection ◽

Single Photon Detectors ◽

Photon Detection Efficiency

Avalanche photodiodes are crucial materials for single-photon detection. Single-photon detectors are indispensable components for optical experiments and applications such as quantum information processing and quantum communications, both of which demand high single-photon detection efficiency. The authors have first developed a silicon single-photon avalanche detector in near infrared spectrum with 1 MHz square wave gating and tested its performance. Then we have also designed a high-speed and high-efficiency silicon single-photon detection system with 152 MHz sine wave gating and improved its single-photon detection efficiency to 77.48%.

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