Absorption Spectra and Transverse Photocurrent Spectra of GaAs/AlGaAs Multiple Quantum Wells
GaAs/AlGaAs多量子阱结构的光吸收谱和横向光电流谱

Transverse photocurrent spectra and absorption spectra of MBE GaAs/AlGaAs MQWshave been studied.The photocurrent spectra show various exciton peaks and an extrinsic absorptionfrom acceptor levels in the wells to the n=1 electron subband.From both allowed andforbidden transitions,two electron and five hole subbands are determined. Our data are inexcellent agreement with a square well calculation using Q_c=0.60, m_e=0.0665, m_h=0.45 andm-l=0.12. A comparison of absorption spectra with photoluminescence spectra has been made.