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Proceedings Paper

Improvement of dynamical properties of superconductor switches controlled by laser pulses
Author(s): Jan Waskiewicz
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Paper Abstract

Literature referring to superconductor optoelectronic switches report about curious phenomenon of improvement of dynamical properties as a result of introduction of a thin, low thermal conductivity buffer layer. Present paper is a trial of interpretation of this phenomenon basing on analysis of non-stationary temperature fields within the element's structure. The analysis has been made using the method of numeric modeling of thermal processes occurring within the thin-layer structure consisting of high-temperature superconductor YBa2Cu3O7-x sputtered over the LaAlO3 substrate and separated with an intermediate SrTiO3 layer. Numerical modeling is very difficult due to strong nonlinearity of resistivity in relation to temperature and current. The essential reason of shortening of key's switch-off time is the fact that the buffer layer limits heat diffusion towards the substrate during switching-on time; as a result its switching-off occurs through heat abstraction towards the high thermal conductivity substrate which temperature is lower than the superconductor's switch-off temperature.

Paper Details

Date Published: 6 October 2003
PDF: 5 pages
Proc. SPIE 5230, Laser Technology VII: Progress in Lasers, (6 October 2003); doi: 10.1117/12.531763
Show Author Affiliations
Jan Waskiewicz, Bialystok Technical Univ. (Poland)

Published in SPIE Proceedings Vol. 5230:
Laser Technology VII: Progress in Lasers
Wieslaw L. Wolinski; Zdzislaw Jankiewicz; Ryszard S. Romaniuk, Editor(s)

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