Electrically controllable cyclotron resonance

Cyclotron resonance (CR) is considered one of the fundamental phenomena in conducting systems. In this paper, we study CR a gated two-dimensional (2D) electron system (ES). Namely, analyze absorption electromagnetic radiation incident normal to 2DES, where standard dielectric substrate separates 2D sheet and metallic steering electrode ("gate"); whole placed perpendicular magnetic field. Our analysis reveals redshift peak frequency compared cyclotron frequency. The appears low-frequency regime, when resonant much less than Fabry-Perot modes natural resonator "2D - gate". Moreover, find shift be dependent on density 2DES. Therefore, it can controlled by varying gate voltage. We predict that large realistic or back-gated 2DESs. obtained controllability 2DES opens door for exploring new physics applications phenomenon.