scholarly journals Josephson junction infrared single-photon detector

Science ◽  
2021 ◽  
Vol 372 (6540) ◽  
pp. 409-412
Author(s):  
Evan D. Walsh ◽  
Woochan Jung ◽  
Gil-Ho Lee ◽  
Dmitri K. Efetov ◽  
Bae-Ian Wu ◽  
...  
Keyword(s):  
Josephson Junction ◽  
High Speed ◽  
High Performance ◽  
Near Infrared ◽  
Single Photon ◽  
Critical Role ◽  
Superconducting Devices ◽  
High Sensitivity ◽  
Single Photon Detector ◽  
Detection Mechanism

Josephson junctions are superconducting devices used as high-sensitivity magnetometers and voltage amplifiers as well as the basis of high-performance cryogenic computers and superconducting quantum computers. Although device performance can be degraded by the generation of quasiparticles formed from broken Cooper pairs, this phenomenon also opens opportunities to sensitively detect electromagnetic radiation. We demonstrate single near-infrared photon detection by coupling photons to the localized surface plasmons of a graphene-based Josephson junction. Using the photon-induced switching statistics of the current-biased device, we reveal the critical role of quasiparticles generated by the absorbed photon in the detection mechanism. The photon sensitivity will enable a high-speed, low-power optical interconnect for future superconducting computing architectures.

Materials Development for High Efficiency Superconducting Nanowire Single-Photon Detectors

2015 ◽  
Vol 1807 ◽  
pp. 1-6 ◽  
Author(s):  
A.E. Lita ◽  
V.B. Verma ◽  
R. D. Horansky ◽  
J.M. Shainline ◽  
R.P. Mirin ◽  
...  
Keyword(s):  
Thin Films ◽  
High Speed ◽  
Near Infrared ◽  
High Efficiency ◽  
Single Photon ◽  
Amorphous Material ◽  
Superconducting Transition ◽  
Photon Detectors ◽  
Single Photon Detectors ◽  
Superconducting Nanowire

ABSTRACTSuperconducting nanowire single-photon detectors (SNSPDs) based on ultra-thin films have become the preferred technology for applications that require high efficiency single-photon detectors with high speed, high timing resolution, and low dark count rates at near-infrared wavelengths. Since demonstration of the first SNSPD using NbN thin films, an increasingly larger number of materials are being explored. We investigate amorphous thin film alloys of MoSi, MoGe, and WRe with the goal of optimizing SNSPDs for higher operating temperature, high efficiency and high speed. To explore material adequacy for SNSPDs, we have measured superconducting transition temperature (Tc) as a function of film thickness and sheet resistance, as well as critical current densities. In this paper we present our results comparing these materials to WSi, another amorphous material widely used for SNSPD devices.

scholarly journals Afterpulse-like phenomenon of superconducting single photon detector in high speed quantum key distribution system

2011 ◽  
Vol 19 (20) ◽  
pp. 19562 ◽  
Author(s):  
M. Fujiwara ◽  
A. Tanaka ◽  
S. Takahashi ◽  
K. Yoshino ◽  
Y. Nambu ◽  
...  
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
High Speed ◽  
Single Photon ◽  
Key Distribution ◽  
Photon Detector ◽  
Single Photon Detector

scholarly journals A HAWAII-2RG Infrared Camera Operated Under Fast Readout Mode for Solar Polarimetry

2020 ◽  
Author(s):  
Yoichiro Hanaoka ◽  
Yukio Katsukawa ◽  
Satoshi Morita ◽  
Yukiko Kamata ◽  
Noriyoshi Ishizuka
Keyword(s):  
Space Weather ◽  
High Speed ◽  
High Performance ◽  
Near Infrared ◽  
Infrared Camera ◽  
Polarization Modulation ◽  
The Sun ◽  
Interface Card ◽  
Infrared Wavelengths ◽  
Solar Polarimetry

Abstract Polarimetry is a crucial method to investigate solar magnetic elds. From the viewpoint of space weather, the magnetic eld in solar laments, which occasionally erupt and develop into interplanetary ux ropes, is of particular interest. To measure the magnetic eld in laments, high-performance polarimetry in the near-infrared wavelengths employing a high-speed, large-format detector is required; however, so far, this has been difficult to be realized. Thus, the development of a new infrared camera for advanced solar polarimetry has been started, employing a HAWAII-2RG (H2RG) array by Teledyne, which has 2048 2048 pixels, focusing on the wavelengths in the range of 1.0{1.6 m. We solved the problem of the difficult operation of the H2RGs under \fast readout mode" synchronizing with high-speed polarization modulation by introducing a \MACIE" (Markury ASIC Control and Interface Electronics) interface card and new assembly codes provided by Markury Scientic. This enables polarization measurements with high frame-rates, such as 29{117 frames per seconds, using a H2RG. We conducted experimental observations of the Sun and conrmed the high polarimetric performance of the camera.

scholarly journals Single photon detection and signal analysis for high sensitivity dosimetry based on optically stimulated luminescence with beryllium oxide

2018 ◽  
Vol 170 ◽  
pp. 09009 ◽  
Author(s):  
J. Radtke ◽  
J. Sponner ◽  
C. Jakobi ◽  
J. Schneider ◽  
M. Sommer ◽  
...  
Keyword(s):  
Data Analysis ◽  
Single Photon ◽  
High Sensitivity ◽  
Beryllium Oxide ◽  
Optically Stimulated Luminescence ◽  
Single Photon Detection ◽  
Single Photon Detector ◽  
Photon Detection ◽  
Time Resolved ◽  
Frequency Information

Single photon detection applied to optically stimulated luminescence (OSL) dosimetry is a promising approach due to the low level of luminescence light and the known statistical behavior of single photon events. Time resolved detection allows to apply a variety of different and independent data analysis methods. Furthermore, using amplitude modulated stimulation impresses time- and frequency information into the OSL light and therefore allows for additional means of analysis. Considering the impressed frequency information, data analysis by using Fourier transform algorithms or other digital filters can be used for separating the OSL signal from unwanted light or events generated by other phenomena. This potentially lowers the detection limits of low dose measurements and might improve the reproducibility and stability of obtained data. In this work, an OSL system based on a single photon detector, a fast and accurate stimulation unit and an FPGA is presented. Different analysis algorithms which are applied to the single photon data are discussed.

Next-Generation Optical Probing Tools for Design Debug of High Speed Integrated Circuits

2002 ◽  
Author(s):  
William Lo ◽  
Kenneth Wilsher ◽  
Richard Malinsky ◽  
Nina Boiadjieva ◽  
Chun-Cheng Tsao ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
High Speed ◽  
Detection Efficiency ◽  
Single Photon ◽  
Photon Emission ◽  
Next Generation ◽  
Large Area ◽  
Single Photon Detector ◽  
Time Resolved ◽  
Optical Probing

Abstract Time-resolved photon emission (TRPE) results, obtained using a new superconducting, single-photon detector (SSPD) are reported. Detection efficiency (DE) for large area detectors has recently been improved by >100x without affecting SSPDs inherently low jitter (≈30 ps) and low dark-count rate (<30 s-1). TRPE measurements taken from a 0.13 μm geometry CMOS IC are presented. A single laser, time-differential probing scheme that is being investigated for next-generation laser voltage probing (LVP) is also discussed. This new scheme is designed to have shot-noise-limited performance, allowing signals as small as 100 parts-per-million (ppm) to be reliably measured.

High sensitivity mid-infrared superconducting single-photon detector with Mo0.8Si0.2 nanowire

2021 ◽  
Author(s):  
Qi Chen ◽  
Rui Ge ◽  
Labao Zhang ◽  
Feiyan Li ◽  
Biao Zhang ◽  
...  
Keyword(s):  
Single Photon ◽  
High Sensitivity ◽  
Photon Detector ◽  
Single Photon Detector ◽  
Mid Infrared
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