Subpicosecond dynamics of hot carrier relaxation in InP and GaAs

Xiang-Qian Zhou; Uli Lemmer; Klaus Seibert; Gyu Cheon Cho; Waldemar Kuett; Karl Wolter; Heinrich Kurz

doi:10.1117/12.20334

1 August 1990 Subpicosecond dynamics of hot carrier relaxation in InP and GaAs

Xiang-Qian Zhou, Uli Lemmer, Klaus Seibert, Gyu Cheon Cho, Waldemar Kuett, Karl Wolter, Heinrich Kurz

Proceedings Volume 1268, Applications of Ultrashort Laser Pulses in Science and Technology; (1990) https://doi.org/10.1117/12.20334
Event: The International Congress on Optical Science and Engineering, 1990, The Hague, Netherlands

Abstract

Time resolved measurements of the hot carrier relaxation in nP have been performed at room temperature using four different femtosecond techniques. At carrier densities between 1016cm3 and a few times 1018cm3 carrier-carrier scattering has been found to dominate the initial relaxation ensuring the internal thermalization of electrons and holes on a time scale of 1OO'2OO fs. At high excitation densities the subpicosecond cooling of the electrons is found to be clearly slower than expected from simple calculations of the e-LO-phonon interaction. The different relaxation behaviour in GaAs is attributed to strong intervalley scattering mechanisms.

Citation Download Citation

Xiang-Qian Zhou, Uli Lemmer, Klaus Seibert, Gyu Cheon Cho, Waldemar Kuett, Karl Wolter, and Heinrich Kurz "Subpicosecond dynamics of hot carrier relaxation in InP and GaAs", Proc. SPIE 1268, Applications of Ultrashort Laser Pulses in Science and Technology, (1 August 1990); https://doi.org/10.1117/12.20334

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