We demonstrate resonant detection of terahertz radiation by two-dimensional plasma waves in two field effect devices: a commercial field effect transistor (FET) and a double quantum well field effect transistor with a periodic grating gate. In both devices, the standing 2-D plasmon is tuned to the frequency of the THz radiation by varying the gate bias. The double quantum well field effect transistors exhibits a rich photoconductive response corresponding to spatial harmonics of the standing 2-D plasmons under the metal part of the periodic gate.
Impact of H2 High-Pressure Annealing Onto InGaAs Quantum-Well Metal–Oxide–Semiconductor Field-Effect Transistors With Al2O3/HfO2 Gate-Stack