Ultrafast field-dependent response of bandedge photogenerated electrons in quantum-well structures

Author

Joshi, Ravindra P. ; Grondin, Robert O. ; El-Ghazaly, Samir M.

Author_Institution

Dept. of Electr. & Comput. Eng., Old Dominion Univ., Norfolk, VA, USA

Volume

28

Issue

10

fYear

1992

fDate

10/1/1992 12:00:00 AM

Firstpage

2456

Lastpage

2463

Abstract

The authors analyze the field-dependent femtosecond dynamics of bandedge photogenerated electrons undergoing parallel transport in quantum-well structures. The intracollisional field effect, breakdown of the Fermi golden rule, quantization of the phonon modes, and transient charge variations are all comprehensively included. The electron heating rates at zero fields are in agreement with experiments. The results are indicative of an adequate description of the electron-phonon interaction in two-dimensional systems. At high fields, an energy overshoot structure in keeping with recently observed data was observed without any real-space transfer

Keywords

electron-phonon interactions; high field effects; hot carriers; photoconductivity; semiconductor quantum wells; solid-state plasma; Fermi golden rule breakdown; bandedge photogenerated electrons; cold photogenerated plasma; electron heating rates; electron-phonon interaction; energy overshoot structure; femtosecond dynamics; high fields; intracollisional field effect; parallel transport; phonon mode quantisation; quantum-well structures; transient charge variations; two-dimensional systems; ultrafast field dependent response; zero fields; Acceleration; Ballistic transport; Electric breakdown; Electrons; Nonlinear optics; Phonons; Probes; Quantization; Quantum wells; Ultrafast optics;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.159552

Filename

159552