Abstract
We study photoinduced microwave absorption (PMA) at 36 GHz by photogenerated carriers and, in particular, the classical cyclotron resonance (CR) of both electrons and holes in undoped GaAs/AlGaAs QWs. Analyzing the CR lineshape, electron and hole cyclotron masses and their mobilities are obtained. It is found that the electron cyclotron mass (mcr) increases with increasing microwave power and with lattice temperature. This is discussed in terms of a decreased electron localization in the spatially fluctuating QW potential.
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