Photothermal transitions of magnetoexcitons in GaAs/AlxGa1-xAs quantum wells

Article

关键词: OPTICALLY DETECTED RESONANCE;    FAR-INFRARED RADIATION;    INTERNAL TRANSITIONS;    EXCITONS;    PHOTOLUMINESCENCE;    SUPERLATTICES;    ABSORPTION;   

DOI  :  10.1103/PhysRevB.66.205301

来源: SCIE

【 摘 要 】

By monitoring changes in excitonic photoluminescence (PL) that are induced by terahertz (THz) radiation, we observe resonant THz absorption by magnetoexcitons in GaAs/AlxGa1-xAs 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-->2p(+) resonance where heavy hole excitons are photothermally converted into light hole excitons.

【 授权许可】

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