1202.6077 (L. Bryja et al.)

Cyclotron-resonant exciton transfer between the nearly free and strongly
localized radiative states of a two-dimensional hole gas in a high magnetic
field    [PDF]

L. Bryja, J. Jadczak, A. Wojs, G. Bartsch, D. R. Yakovlev, M. Bayer, P. Plochocka, M. Potemski, D. Reuter, A. D. Wieck

Avoided crossing of the emission lines of a nearly free positive trion and a cyclotron replica of an exciton bound to an interface acceptor has been observed in the magneto-photoluminescence spectra of p-doped GaAs quantum wells. Identification of the localized state depended on the precise mapping of the anti-crossing pattern. The underlying coupling is caused by an exciton transfer combined with a resonant cyclotron excitation of an additional hole. The emission spectrum of the resulting magnetically tunable coherent state probes weak localization in the quantum well.

View original: http://arxiv.org/abs/1202.6077