Microwave to Millimeter-wave Electrodynamic Response and Applications of Semiconductor Nanostructures: LDRD Project 67025 Final Report

摘要

LDRD Project 67025 provided support to pursue experiments studying the electrodynamic response and possible applications of various innovative semiconductor based nanostructures from microwave (approximately 1 GHz) up to millimeter- and submillimeter-wave (several hundred GHz) frequencies. Under this project, the nonlinear behavior of plasmons in a high-mobility GaAs-AlGaAs quantum-well field-effect transistor was studied up to 145 GHz using difference frequency mixing techniques. Applications of such a plasmon transistor as a millimeter-wave mixer receiver were investigated. Also, negative refractive-index metamaterials consisting of arrays of splitring resonators were fabricated and their transmission resonance spectra measured from 50 to 2000 GHz. High quality factor resonances with large negative index were observed, and applications as a tunable filter or modulator investigated.