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The appearance of “cooling” phenomena in the noise temperature spectrum is presented. The results are obtained in the framework of two, hydrodynamic and Monte Carlo, models of carrier transport and related electronic noise description in the channels of FET and MOSFET structures. The cooling effect was obtained under excitation of 2D-plasma waves in the gated region of the channel due to streaming-plasma...
Here we report on the efficient detection of THz radiation generated from Ti:sapphire femtosecond laser system. The large-area interdigitated antenna is excited by optical pulses with pulse duration from 15 to 47 fs. We have tested two AlGaN/GaN HEMT-based THz detectors with integrated broadband antennas. Detectors are comparable in sensitivity but differ in applied parasitic signals elimination techniques...
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