Back to Search Start Over

Nonequilibrium and bolometric responses of YBaCuO thin films to high-frequency modulated laser radiation

Authors :
M. Danerud
Dag Winkler
E. M. Gershenzon
M. A. Zorin
Gregory Goltsman
Mikael Lindgren
Boris S. Karasik
Source :
Journal of Superconductivity. 8:11-15
Publication Year :
1995
Publisher :
Springer Science and Business Media LLC, 1995.

Abstract

Picosecond nonequilibrium and slow bolometric responses to infrared radiation from a patterned high-T c superconducting (HTS) film in resistive and normal states deposited onto LaAlO3, NdGaO3, and MgO substrates were investigated using both pulse and modulation techniques. The response time of 35 ps to a laser pulse of 17 ps FWHM has been observed. The intrinsic response time of the fast process is expected to be about a few picoseconds. The modulation technique, being free from the disadvantages of pulse methods (poor sensitivity, limited dynamic range), makes the detailed study of a number of relaxation processes possible. Besides the nonequilibrium response, two kinds of bolometric processes, namely phonon transport through the film-substrate interface and phonon thermal diffusion in a substrate, manifest themselves in certain frequency dependences.

Details

ISSN :
15729605 and 08961107
Volume :
8
Database :
OpenAIRE
Journal :
Journal of Superconductivity
Accession number :
edsair.doi...........e22630e45c7d30a1c8566b25c21d10fc
Full Text :
https://doi.org/10.1007/bf00732234