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Superconducting Optical Detectors

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Physical Sensors".

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 2944

Special Issue Editors


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Guest Editor
Quantum Materials and Photonics Research Group QMatterPhotonics, Department of Particle Physics, University of Santiago de Compostela, ES-15782 Santiago de Compostela, Spain
Interests: superconducting devices; photodetectors; nanostructured materials; nanostructured and microstructured superconductors; high temperature superconductors
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Guest Editor
Quantum Materials and Photonics Research Group, Faculty of Physics, University of Santiago de Compostela, Campus Vida S/N, ES-15782 Santiago de Compostela, A Coruña, Spain
Interests: superconducting; hybrid-superconducting materials and devices

Special Issue Information

Dear Colleagues,

The special properties of superconductors provide a key opportunity to produce optical and photonic detectors of very high sensibilities that are difficult to obtain by other means. This is becoming increasingly relevant due to emerging applications like THz detectors, photon-counting sensors, and quantum-computing photonic setups, among others. It is also being fostered by new possibilities of custom-tuning the superconducting characteristics using improved micro- and nano-structuration, or using novel superconductors of high and low critical temperatures.

This Special Issue is devoted to the development, testing, and modeling of superconducting optical and photonic detectors and also to the study of superconducting materials custom optimized for such devices.

Topics include, but are not limited, to the following:

  • Transition edge superconducting bolometers
  • Hot electron superconducting bolometers
  • Superconducting optical detectors based on tunnel junctions and arrays
  • SQUID-based optical detectors
  • Kinetic inductance detectors
  • Single-photon and photon-counting superconducting detectors
  • Superconducting optical sensors for astronomy and space-based applications
  • THz superconducting detectors
  • Micro and nanostructure optimization of superconductors for optical sensing
  • New superconducting or hybrid superconducting materials for optical sensing

Dr. M.V. Ramallo
Dr. José Lorenzo Castaño Verde
Guest Editors

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Published Papers (1 paper)

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Research

16 pages, 3897 KiB  
Article
Terahertz Spectroscopy of Gas Absorption Using the Superconducting Flux-Flow Oscillator as an Active Source and the Superconducting Integrated Receiver
by Nickolay V. Kinev, Kirill I. Rudakov, Lyudmila V. Filippenko, Andrey M. Baryshev and Valery P. Koshelets
Sensors 2020, 20(24), 7267; https://doi.org/10.3390/s20247267 - 18 Dec 2020
Cited by 7 | Viewed by 2048
Abstract
We report on the first implementation of a terahertz (THz) source based on a Josephson flux-flow oscillator (FFO) that radiates to open space. The excellent performance of this source and its maturity for practical applications has been demonstrated by the spectroscopy of gas [...] Read more.
We report on the first implementation of a terahertz (THz) source based on a Josephson flux-flow oscillator (FFO) that radiates to open space. The excellent performance of this source and its maturity for practical applications has been demonstrated by the spectroscopy of gas absorption. To study the radiated power, we used a bolometric detection method and additionally calibrated the power by means of pumping the superconductor–insulator–superconductor (SIS) junction, integrated on a single chip with the FFO. For calibration, we developed a program using the SIS-detected power calculations in accordance with the Tien and Gordon model. The power emitted to open space is estimated to be from fractions of µW to several µW in the wide region from 0.25 THz up to 0.75 THz for different designs, with a maximum power of 3.3 µW at 0.34 THz. Next, we used a gas cell and a heterodyne superconducting integrated receiver to trace the absorption lines of water and ammonia with a spectral resolution better than 100 kHz. Our experiment for gas absorption is the first demonstration of the applicability of the FFO as an external active source for different tasks, such as THz spectroscopy, near-field THz imaging and microscopy. Full article
(This article belongs to the Special Issue Superconducting Optical Detectors)
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