Probing semiconductor carrier kinetics with ultrafast nonlinear Faraday rotation
- Department of Physics, University of Florida, P.O. Box 118440, Gainesville, Florida 32611 (United States)
We demonstrate that in semiconductors with strong Coulomb exchange correlations, transient nonlinear Faraday rotation spectroscopy (FRS) more accurately probes the ultrafast carrier relaxation than the widely used differential transmission spectroscopy (DTS). We calculate nonlinear FRS and DTS by solving the six-band semiconductor Bloch equations for magnetic Cd{sub 1{minus}x}Mn{sub x}Te and CdTe quantum wells. We show that for highly excited carriers, nonlinear FRS rotation spectra closely monitor the ultrafast thermalization of the carrier distribution, unlike DTS signals. We further show that the magnetic band tuning capabilities (giant Zeeman splitting) of dilute magnetic semiconductors allows one to investigate the electron kinetics in selective bands. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 664723
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 58, Issue 20; Other Information: PBD: Nov 1998
- Country of Publication:
- United States
- Language:
- English
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