Whether acoustic mismatch theory holds for the fast bolometric response of YBaCuO films

Alex D. Semenov; A. V. Sergeev; Pavel B. Kouminov; Eugeni M. Gershenzon; M. A. Heusinger; Rainer S. Nebosis; Karl F. Renk

doi:10.1117/12.176152

20 May 1994 Whether acoustic mismatch theory holds for the fast bolometric response of YBaCuO films

Alex D. Semenov, A. V. Sergeev, Pavel B. Kouminov, Eugeni M. Gershenzon, M. A. Heusinger, Rainer S. Nebosis, Karl F. Renk

Author Affiliations +

Proceedings Volume 2159, High-Temperature Superconducting Detectors: Bolometric and Nonbolometric; (1994) https://doi.org/10.1117/12.176152
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

The transmission probability of the interface between YBaCuO film and different substrates for thermal phonons incident both from the film and from the substrate are obtained from photoresponse measurements performed at the transition temperature of YBaCuO. The experimental values are compared with the predictions of the acoustic mismatch model and the diffusive mismatch model taking account of optical phonon modes as well as the difference between the speed of sound and the group velocity of acoustic phonons. Although absolute values of transmission probabilities derived from these two models are close to each other, the experimental data rather indicate the validity of the acoustic mismatch model.

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Alex D. Semenov, A. V. Sergeev, Pavel B. Kouminov, Eugeni M. Gershenzon, M. A. Heusinger, Rainer S. Nebosis, and Karl F. Renk "Whether acoustic mismatch theory holds for the fast bolometric response of YBaCuO films", Proc. SPIE 2159, High-Temperature Superconducting Detectors: Bolometric and Nonbolometric, (20 May 1994); https://doi.org/10.1117/12.176152

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