Electronically Controlled Nonlinear Devices on the Graphene Plasmonics Platform in the Far- and Mid-Infrared Range. Review

The relevance of the topic is because of the need to master the infrared (IR) range for optical telecommunications systems, IR spectroscopy and biophotonics applications and is dictated by the needs of nonlinear IR optics in the implementation of active optical functions based on graphene, such as IR radiation generation, frequency conversion for applications in optical communications, material processing, precision measurements, spectroscopic sensing, and biological sensors. The purpose of this work is to present the principles of construction and operation of electrically tunable nonlinear devices in the far- and mid-IR ranges: harmonic generators, multipliers, frequency converters, and mixers based on graphene metasurfaces, using the latest achievements of graphene plasmonics.