Large signal analytical and SPICE model of THz plasmonic FET

Terahertz detectors using FETs operating in the plasmonic mode have demonstrated high responsivity and low noise. Their design, optimization, and parameter extraction requires accurate models reproducing their response over many orders of magnitude of the THz radiation intensity and ability to account for device-circuit interactions. We have developed a new compact circuit THz SPICE model that allows for the circuit simulation of plasmonic FETs, such as plasmonic detectors with on-chip amplifiers. The THz SPICE model is validated with analytical models and experimentally to show it is in good agreement.