Power Dependence of the Amplitude of the Microwave Radiation Magnetoresistance and Polarization Sensitivity

Abstract

We have studied the power dependence of the amplitude of the microwave radiation magnetoresistane oscillations and the linear polarization sensistivity of the oscillations. We have found that the amplitude of the microwave radiation induced oscillations increases nonlinearly with the microwave power. The inelastic model suggested that the apmplitude of the radiation induced magnetoresistance oscillations should increase linearly with the microwave power. It has been found that radiation induced oscillatory magnetoresistance in high quality gallium arsenide two dimensional electron systems indicated a nonlinear variation in the amplitude of the radiation induced magnetoresistance oscillations with the microwave power at the oscillatory extrema alongwith a cosine squared dependence on the polarization angle. A displacement model indicated the dependence of the oscillatory magnetroresistance on circular and linear polarization and the inelastic model has strongly supported that microwave radiation induced oscillations are insensitive to the polarization for both linearly and circularly polarized microwaves. In our work the transverse electric mode is excited by the microwave antenna and the specimen is subject to the mode of the circular waveguide. Microwave radiation stabilization of the edge ballastic trajectories, simulations show weakly depends on the microwave polarization axis and nonlinearly depends on the microwave power.