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

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


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 a quite broad range between about 1 × 1010 cm-2 and 2 × 1011 cm-2 via gate electrodes. In photoluminescence (PL) and absorption experiments on 2DES ...

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