Abstract

The idea to use plasma waves in gated structures for THz emission and detection was put forward by M.Dyakonov and M.Shur [1,2], who considered a single field-effect transistor (FET) as a tunable plasmonic cavity. Later it was shown that multigated devices such as grating gate structures (GGS) are more promising in view of possible applications because they are much better coupled to THz radiation. In such GGS, the 2D electron gas is periodically modulated in X direction, creating plasmonic crystal (PC) [3]. Simplest model of PC consists of alternating long strips with different widths L₁ and L₂ that have plasma wave velocities s₁ and s₂, respectively. Here, we consider transmission coefficient T of the THz radiation linearly polarized along the X-direction through the GGS in the presence of magnetic field perpendicular to modulated channel (in Z-direction).

© 2023 IEEE