Terahertz emission in an InGaAs-based dual-grating-gate high-electron-mobility transistor plasmonic photomixer
Tomotaka Hosotani, Akira Satou, Taiichi Otsuji
Abstract
Abstract We report on terahertz (THz) emission from an InGaAs-based DC-current-driven dual-grating-gate high-electron-mobility transistor excited by photomixed dual continuous-wave-infrared (dual-CW-IR) laser irradiation. The difference frequency ( δf ) of the dual-CW-IR laser beams was set around the THz plasmon mode frequencies at different bias conditions. The radiation spectra from the device observed at 120 K showed distinctive emissions beyond the black-body radiation, which were promoted by δf -dependent coherent plasmons. The results suggest the occurrence of plasmonic boom instability stimulated by the DC current flow in the 2D channel under pertinent DC bias voltages.
Topics & Concepts
Terahertz radiationPlasmonOptoelectronicsGratingLaserMaterials scienceTransistorHigh-electron-mobility transistorBiasingPhotomixingFar-infrared laserOpticsPhysicsVoltageTerahertz metamaterialsQuantum mechanicsTerahertz technology and applicationsSpectroscopy and Laser ApplicationsPlasmonic and Surface Plasmon Research