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In this paper, we explain the THz detection mechanism in sub-threshold Si MOSFETs by exploiting the exponential dependence of channel electron density to the gate-source voltage. According to our theory, this high frequency non-linear dependence is the underlying mechanism for rectification of THz radiation. The maximum detection frequency is limited by dielectric relaxation time of the electrons...
A framework for designing covert sonar waveform and assessment of its steganographic security for sonar applications is presented, based on a model for the underwater ambient acoustic environment the waveform is intended to hide under. Adopting the lessons from the steganography literature, steganographic security is measured not by evaluating performance against potential intercept detectors, but...
In this work, a new detection method for Terahertz (THz) radiation in a MOSFET transistor based on Thermionic Emission (TE) has been demonstrated. Theoretical analysis and experimental data have shown that under sub-threshold biasing conditions, the detection of THz signals from thermionic emission through a potential barrier between the highly doped source region and depleted channel region is far...
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