Charge and spin dynamics in a two-dimensional electron gas

A number of time-resolved optical experiments probing and controlling the spin and charge dynamics of the high-mobility two-dimensional electron gas in a GaAs/AlGaAs heterojunction are discussed. These include time-resolved reflectivity, luminescence, transient grating, magneto-optical Kerr effect,...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2007-07, Vol.19 (29), p.295206-295206
Main Authors: Pugžlys, A, Rizo, P J, Ivanin, K, Slachter, A, Reuter, D, Wieck, A D, van der Wal, C H, van Loosdrecht, P H M
Format: Article
Language:English
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Summary:A number of time-resolved optical experiments probing and controlling the spin and charge dynamics of the high-mobility two-dimensional electron gas in a GaAs/AlGaAs heterojunction are discussed. These include time-resolved reflectivity, luminescence, transient grating, magneto-optical Kerr effect, and electro-optical Kerr effect experiments. The optical experiments provide information on the carrier lifetimes and spin dephasing times, as well as on the carrier diffusion coefficient which directly gives the charge mobility. A combination of the two types of Kerr experiment proves to be useful in extracting both the carrier lifetimes and spin dephasing times in a single experiment.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/19/29/295206