Linear and ultrafast optical spectroscopy in the regime of the quantum Hall effect

DOI to cite this document:: 10.5283/epub.9621

Brooks, K.-B. ; Su, B. ; Schröter, P. ; Heyn, Ch.

; Heitmann, D. ; Wegscheider, Werner ; Apalkov, V. M. ; Chakraborty, Tapash ; Perakis, I. E. ; Schüller, Christian

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Date of publication of this fulltext: 02 Oct 2009 08:01

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Abstract

We review our optical experiments on two-dimensional electron systems (2DES) of different mobilities, realized in modulation-doped GaAs-AlGaAs single quantum wells, in quantizing magnetic fields. The carrier densities of the 2DESs could be tuned in quite broad range between about 1 x 10(10) cm(-2) via gate electrodes. In photoluminescence (PL) and absorption experiments on 2DES with moderate ...