Direct study of nonequilibrium carriers near Fermi level of Au film by optical reflection and transmission in femtosecond scale

A. L. Dobryakov; Yurii E. Lozovik; V. M. Farztdinov; S. A. Kovalenko; Gerd Marowsky; Juru A. Matveets; S. P. Merkulova

doi:10.1117/12.306206

20 April 1998 Direct study of nonequilibrium carriers near Fermi level of Au film by optical reflection and transmission in femtosecond scale

A. L. Dobryakov, Yurii E. Lozovik, V. M. Farztdinov, S. A. Kovalenko, Gerd Marowsky, Juru A. Matveets, S. P. Merkulova

Author Affiliations +

Proceedings Volume 3359, Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics 1997; (1998) https://doi.org/10.1117/12.306206
Event: International Conference on Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics, 1997, Kiev, Ukraine

Abstract

The new method of investigation of Fermi surface and Fermi liquid behavior by femtosecond laser spectroscopy is considered. The method consists in study of spectral dependence of the nonequilibrium charge carriers relaxation time by pump-supercontinuum probe technique. Photoinduced optical properties and relaxation of nonequilibrium charge carriers in Au film in a femtosecond time scale are analyzed. It is shown that the relaxation rate sharply slows down in the spectral area related to optical transitions into the vicinity of Fermi level. The form of the peak gives an information on damping of the quasiparpicles near Fermi surface and on deviation of thermalization of nonequilibrium electrons from the conventional equilibrium Fermi-liquid behavior. Studying of ultrafast relaxation time of electron response provides the direct method of investigation thermalization of nonequilibrium electrons in real femtosecond time scale and may give the unique information about deviations from conventional Fermi liquid behavior by femtosecond laser spectroscopy.

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A. L. Dobryakov, Yurii E. Lozovik, V. M. Farztdinov, S. A. Kovalenko, Gerd Marowsky, Juru A. Matveets, and S. P. Merkulova "Direct study of nonequilibrium carriers near Fermi level of Au film by optical reflection and transmission in femtosecond scale", Proc. SPIE 3359, Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics 1997, (20 April 1998); https://doi.org/10.1117/12.306206

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