Diehl, Helgi and Shalygin, V. and Danilov, Sergey and Tarasenko, S. and Bel'kov, V. and Schuh, Dieter and Wegscheider, Werner and Prettl, Wilhelm and Ganichev, Sergey (2007) Magneto-gyrotropic photogalvanic effect due to inter-subband absorption in (001)-grown GaAs quantum wells. Journal of Physics: Condensed Matter 19, p. 436232.
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We report on the observation of the magneto-photogalvanic effect (MPGE) due to inter-subband transitions in (001)-oriented GaAs quantum wells. This effect is related to the gyrotropic properties of the structures. It is shown that inter-subband absorption of linearly polarized radiation may lead to spin-related as well as spin independent photocurrents if an external magnetic field is applied in the plane of the quantum well. The experimental results are analyzed in terms of the phenomenological theory and microscopic models of MPGE based on either asymmetric optical excitation or asymmetric relaxation of carriers in k-space. We observed resonant photocurrents not only at oblique incidence of radiation but also at normal incidence demonstrating that conventionally applied selection rules for the inter-subband optical transitions are not rigorous.
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev|
Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Wilhelm Prettl
Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider
|Projects:||SFB 689: Spinphänomene in reduzierten Dimensionen|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||15 Nov 2007|
|Last Modified:||05 Aug 2009 13:40|