Improvement of dynamical properties of superconductor switches controlled by laser pulses

Jan Waskiewicz

doi:10.1117/12.531763

6 October 2003 Improvement of dynamical properties of superconductor switches controlled by laser pulses

Jan Waskiewicz

Proceedings Volume 5230, Laser Technology VII: Progress in Lasers; (2003) https://doi.org/10.1117/12.531763
Event: 2003 Chapter books, 2003, Bellingham, WA, United States

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 YBa₂Cu₃O_7-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.

Citation Download Citation

Jan Waskiewicz "Improvement of dynamical properties of superconductor switches controlled by laser pulses", Proc. SPIE 5230, Laser Technology VII: Progress in Lasers, (6 October 2003); https://doi.org/10.1117/12.531763

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