Photo-thermal transitions of magneto-excitons in quantum wells

Details Photo-thermal transitions of magneto-excitons in quantum wells Photo-thermal transitions of magneto-excitons in quantum wells

2002-07-12

arxiv.org/abs/cond-mat/0207327v1

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 4 figures

Scientific paper

10.1103/PhysRevB.66.205301

By monitoring changes in excitonic photoluminescence (PL) that are induced by terahertz (THz) radiation, we observe resonant THz absorption by magnetoexcitons in GaAs/AlGaAs quantum wells. Changes in the PL spectrum are explored as a function of temperature and magnetic field, providing insight into the mechanisms which allow THz absorption to modulate PL. The strongest PL-quenching occurs at the heavy hole $1s\to 2p^+$ resonance where heavy hole excitons are photo-thermally converted into light hole excitons.

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