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Title: Studies of the residual absorption of HTSC at submillimeter wavelengths by means of photothermal interference spectroscopy

Abstract

The determination of the residual, low temperature absorption of high temperature superconductors is of interest for applications of this new materials at submillimeter wavelengths and of basic interest. The photothermal interference spectroscopy allows to measure the residual, low temperature absorption of a HTSC. For the determination of the residual absorption of a superconductor a far-infrared beam is periodically modulated and focused on the sample. Absorption leads to a periodic change of the temperature of the sample surface and, due to heat diffusion, also in the gas volume adjacent to the sample. This temperature change in the gas is detected via the refractive index change using a two beam interferometer. The authors studied the residual losses of YBaCuO thin films on various substrates and of BiSrCaCuO (2212) single crystals at submillimeter wavelengths. They find that the frequency dependence of the absorptivity, which shows a frequency squared behavior at microwave frequencies, is less than quadratic at THz-frequencies. The YBaCuO thin films show a plateau between 0.6 THz and 4 THz with an absolute value of the absorptivity of about 10{sup {minus}2}. A BiSrCaCuO single crystal shows a plateau between 1 THz and 4 THz with an absorptivity in the order of 10{supmore » {minus}3}.« less

Authors:
; ;  [1]
  1. Univ. Regensburg (Germany). Inst. fuer Experimentelle und Angewandte Physik; and others
Publication Date:
OSTI Identifier:
538191
Report Number(s):
CONF-960163-
ISBN 0-8194-2070-0; TRN: 97:018576
Resource Type:
Book
Resource Relation:
Conference: Photonics West `96: conference on quantum well and superlattice physics VI, San Jose, CA (United States), 27 Jan - 2 Feb 1996; Other Information: PBD: 1996; Related Information: Is Part Of Spectroscopic studies of superconductors. Part A: Infrared and Raman spectra; Bozovic, I.; Marel, D. van der [eds.]; PB: 337 p.; Proceedings/SPIE, Volume 2696
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTIVITY; YTTRIUM OXIDES; BARIUM OXIDES; COPPER OXIDES; BISMUTH OXIDES; CALCIUM OXIDES; STRONTIUM OXIDES; HIGH-TC SUPERCONDUCTORS; FREQUENCY DEPENDENCE; EXPERIMENTAL DATA; ENERGY GAP; ELECTRIC CONDUCTIVITY

Citation Formats

Barowski, H S, Arnold, A, and Eder, R. Studies of the residual absorption of HTSC at submillimeter wavelengths by means of photothermal interference spectroscopy. United States: N. p., 1996. Web.
Barowski, H S, Arnold, A, & Eder, R. Studies of the residual absorption of HTSC at submillimeter wavelengths by means of photothermal interference spectroscopy. United States.
Barowski, H S, Arnold, A, and Eder, R. 1996. "Studies of the residual absorption of HTSC at submillimeter wavelengths by means of photothermal interference spectroscopy". United States.
@article{osti_538191,
title = {Studies of the residual absorption of HTSC at submillimeter wavelengths by means of photothermal interference spectroscopy},
author = {Barowski, H S and Arnold, A and Eder, R},
abstractNote = {The determination of the residual, low temperature absorption of high temperature superconductors is of interest for applications of this new materials at submillimeter wavelengths and of basic interest. The photothermal interference spectroscopy allows to measure the residual, low temperature absorption of a HTSC. For the determination of the residual absorption of a superconductor a far-infrared beam is periodically modulated and focused on the sample. Absorption leads to a periodic change of the temperature of the sample surface and, due to heat diffusion, also in the gas volume adjacent to the sample. This temperature change in the gas is detected via the refractive index change using a two beam interferometer. The authors studied the residual losses of YBaCuO thin films on various substrates and of BiSrCaCuO (2212) single crystals at submillimeter wavelengths. They find that the frequency dependence of the absorptivity, which shows a frequency squared behavior at microwave frequencies, is less than quadratic at THz-frequencies. The YBaCuO thin films show a plateau between 0.6 THz and 4 THz with an absolute value of the absorptivity of about 10{sup {minus}2}. A BiSrCaCuO single crystal shows a plateau between 1 THz and 4 THz with an absorptivity in the order of 10{sup {minus}3}.},
doi = {},
url = {https://www.osti.gov/biblio/538191}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 31 00:00:00 EST 1996},
month = {Tue Dec 31 00:00:00 EST 1996}
}

Book:
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