【文章名】Spectra of Rashba- and Dresselhaus-type circular photogalvanic effect at inter-band excitation in GaAs/AlGaAs quantum wells and their behaviors under external strain
Spectra of Rashba- and Dresselhaus-type circular photogalvanic effect at inter-band excitation in GaAs/AlGaAs quantum wells and their behaviors under external strain
[摘要]：Spectra of Rashba- and Dresselhaus-type circular photogalvanic effect (CPGE) at inter-band excitation in symmetric GaAs/Al0.3Ga0.7As quantum wells have been investigated at room temperature. The lineshape of Rashba and Dresselhaus-type CPGE spectra is similar, and the Rashba-type is about five times larger than that of Dresselhaus-type. The CPGE current for 1HH-1E (the first valence subband of heavy hole to the first conduction) has the same sign with that of 1LH-1E, while the strain-induced Rashba-type CPGE has different sign for them, and no detectable strain-induced Dresselhaus-type CPGE is observed. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3702826]
