Fast nonbolometric photoresponse of YBa2Cu3O7-delta films

Mark Johnson

doi:10.1117/12.137672

21 October 1992 Fast nonbolometric photoresponse of YBa₂Cu₃O_7-δ films

Mark Johnson

Proceedings Volume 1677, Ultrafast Lasers Probe Phenomena in Semiconductors and Superconductors; (1992) https://doi.org/10.1117/12.137672
Event: Semiconductors '92, 1992, Somerset, NJ, United States

Abstract

Current biased films of YBa₂Cu₃O_7-(delta ) are illuminated by short (300 fsec) pulses of variable fluence laser light. Transient voltages are measured over the temperature range 10 K < T < 250 K. Near T_c a bolometric response is observed, but below T_c signals are observed, with characteristic decay times of the order of hundreds of psec, that cannot be explained by a bolometric mechanism. Furthermore, a fast precursor, with full width of tens of ps, is observed when the bias current approaches the critical current. These signals are characterized and discussed.

Citation Download Citation

Mark Johnson "Fast nonbolometric photoresponse of YBa₂Cu₃O_7-δ films", Proc. SPIE 1677, Ultrafast Lasers Probe Phenomena in Semiconductors and Superconductors, (21 October 1992); https://doi.org/10.1117/12.137672

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