Tracing the interwell plasmon in a grid-gated double-quantum-well field-effect transistor

摘要

The terahertz (THz) absorption spectra of plasmon modes in a grid-gated double-quantum-well (DQW) field-effect transistor (FET) structure is analyzed theoretically and numerically using the scattering matrix approach and is shown to faithfully reproduce strong resonant features of recent experimental observations of THz photoconductivity in such a structure. No traces of the interwell plasmon is found in THz absorption spectra.