Nonthermal optical response of Y-Ba-Cu-O thin films

Kwok, H. S.; Zheng, J. P.; Ying, Q. Y.; Rao, R.
June 1989
Applied Physics Letters;6/12/1989, Vol. 54 Issue 24, p2473
Academic Journal
Separate fast and slow components were observed in the electrical response to optical excitation of an Y-Ba-Cu-O thin film prepared by laser deposition. The temperature dependence of these two components indicated different thermal and nonthermal behavior. The speed of the nonthermal component is limited by the 6 ns laser pulse duration used in the excitation. It was also demonstrated that thin films that were optically semitransparent were crucial in the observation of the fast nonthermal response.


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