Nonequilibrium and bolometric responses of YBaCuO thin films to high-frequency modulated laser radiation
| Autor: | M. Danerud, Dag Winkler, E. M. Gershenzon, M. A. Zorin, Gregory Goltsman, Mikael Lindgren, Boris S. Karasik |
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| Rok vydání: | 1995 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) business.industry Phonon Bolometer Relaxation (NMR) Substrate (electronics) Condensed Matter Physics Laser Electronic Optical and Magnetic Materials law.invention Condensed Matter::Materials Science Optics law Condensed Matter::Superconductivity Picosecond Optoelectronics Interfacial thermal resistance Thin film business |
| Zdroj: | Journal of Superconductivity. 8:11-15 |
| ISSN: | 1572-9605 0896-1107 |
| DOI: | 10.1007/bf00732234 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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