Strong temperature destabilization of free exciton recombination in a two-dimensional structures with hole gas To cite this article: J Jadczak et al 2011 J. Phys.: Conf. Ser. 334 012050 View the article online for updates and enhancements. Related content The observation of exciton-cyclotron resonance in photoluminescence spectra of a two dimensional hole gas J Jadczak, L Bryja, P Pochocka et al. -Charge conversion of nearly free and impurity bound magneto-trions immersed in 2D electron or hole

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... gas with optically tunable concentration J Jadczak, L Bryja, J Misiewicz et al. -Supplementary data -This content was downloaded from IP address 207.241.231.80 on 25/07 Abstract. We have investigated polarisation resolved magneto-photoluminescence from 22 nm wide asymmetric GaAs quantum well. In contrast to previous studies we observed abrupt decrease of photoluminescence intensity of the neutral exciton line with increasing temperatures whereas photoluminescence intensity of the positively charged exciton remains unchanged. The effect is a clear evidence of different mechanisms of neutral and charged exciton recombination. We have also detected a coupling of two different radiative states: an acceptor-bound and an essentially free trions.