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Title: Infrared detection with high-Tc bolometers and response of Nb tunnel junctions to picosecond voltage pulses

Abstract

Oxide superconductors with high critical temperature Tc make sensitive thermometers for several types of infrared bolometers. The authors built composite bolometers with YBa2Cu3O7-δ thermometers on sapphire substrates which have higher sensitivity than competing thermal detectors which operate at temperatures above 77 K. A 1 x 1 mm bolometer with gold black serving as the radiation absorber has useful sensitivity for wavelengths 20--100 μm. A 3 x 3 mm bolometer with a bismuth film as the absorber operates from 20--100 μm. High-Tc bolometers which are fabricated with micromachining techniques on membranes of Si or Si3N4 have potential application to large-format arrays which are used for infrared imaging. A nonisothermal high-Tc bolometer can be fabricated on a membrane of yttria-stabilized zirconia (YSZ) which is in thermal contact with the heat sink along the perimeter of the membrane. A thermal analysis indicates that the YSZ membrane bolometer can have improved sensitivity compared to the sapphire bolometer for spectrometer applications. The quasiparticle tunneling current in a superconductor-insulator-superconductor (SIS) junction is highly nonlinear in the applied voltage. The authors have made the first measurement of the linear response of the quasiparticle current in a Nb/AlOx/Nb junction over a broad bandwidth from 75--200 GHz. Nonlinear measurementsmore » made with these pulses may provide information about the quasiparticle lifetime. Preliminary data from such measurements are presented.« less

Authors:
 [1]
  1. Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
10169798
Report Number(s):
LBL-34171
ON: DE93016963; TRN: 93:016659
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Thesis/Dissertation
Resource Relation:
Other Information: TH: Thesis (Ph.D.); PBD: May 1993
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; INFRARED RADIATION; RADIATION DETECTION; BOLOMETERS; DESIGN; SUPERCONDUCTING JUNCTIONS; RESPONSE FUNCTIONS; HIGH-TC SUPERCONDUCTORS; THERMOMETERS; SUBSTRATES; FABRICATION; YTTRIUM OXIDES; BARIUM OXIDES; COPPER OXIDES; SAPPHIRE; SENSITIVITY; BISMUTH; USES; ZIRCONIUM OXIDES; THERMAL ANALYSIS; SPECTROMETERS; TUNNEL EFFECT; NIOBIUM; NONLINEAR PROBLEMS; COMPARATIVE EVALUATIONS; EXPERIMENTAL DATA; QUASI PARTICLES; 440500; 665412; THERMAL INSTRUMENTATION; SUPERCONDUCTING DEVICES

Citation Formats

Verghese, Simon. Infrared detection with high-Tc bolometers and response of Nb tunnel junctions to picosecond voltage pulses. United States: N. p., 1993. Web. doi:10.2172/10169798.
Verghese, Simon. Infrared detection with high-Tc bolometers and response of Nb tunnel junctions to picosecond voltage pulses. United States. https://doi.org/10.2172/10169798
Verghese, Simon. 1993. "Infrared detection with high-Tc bolometers and response of Nb tunnel junctions to picosecond voltage pulses". United States. https://doi.org/10.2172/10169798. https://www.osti.gov/servlets/purl/10169798.
@article{osti_10169798,
title = {Infrared detection with high-Tc bolometers and response of Nb tunnel junctions to picosecond voltage pulses},
author = {Verghese, Simon},
abstractNote = {Oxide superconductors with high critical temperature Tc make sensitive thermometers for several types of infrared bolometers. The authors built composite bolometers with YBa2Cu3O7-δ thermometers on sapphire substrates which have higher sensitivity than competing thermal detectors which operate at temperatures above 77 K. A 1 x 1 mm bolometer with gold black serving as the radiation absorber has useful sensitivity for wavelengths 20--100 μm. A 3 x 3 mm bolometer with a bismuth film as the absorber operates from 20--100 μm. High-Tc bolometers which are fabricated with micromachining techniques on membranes of Si or Si3N4 have potential application to large-format arrays which are used for infrared imaging. A nonisothermal high-Tc bolometer can be fabricated on a membrane of yttria-stabilized zirconia (YSZ) which is in thermal contact with the heat sink along the perimeter of the membrane. A thermal analysis indicates that the YSZ membrane bolometer can have improved sensitivity compared to the sapphire bolometer for spectrometer applications. The quasiparticle tunneling current in a superconductor-insulator-superconductor (SIS) junction is highly nonlinear in the applied voltage. The authors have made the first measurement of the linear response of the quasiparticle current in a Nb/AlOx/Nb junction over a broad bandwidth from 75--200 GHz. Nonlinear measurements made with these pulses may provide information about the quasiparticle lifetime. Preliminary data from such measurements are presented.},
doi = {10.2172/10169798},
url = {https://www.osti.gov/biblio/10169798}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat May 01 00:00:00 EDT 1993},
month = {Sat May 01 00:00:00 EDT 1993}
}

Thesis/Dissertation:
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