Nano-scale optical guidance and control in finfet like structure

Abstract

FinFET Structure is proposed as a nanophotonic platform to guide and control light. The hybrid plasmonic mode is made to guide in the dielectric layer around the silicon fin (channel). We are able to guide and control both TE and TM modes in the proposed structure which provides improved electrostatic control over the channel where the gate is wrapped around the Fin. By utilizing the gate and drain–source voltages we can control the charge carriers in the channel thereby realizing phase tuning. In addition, a voltage tunable absorption is also reported through the voltage variable imaginary part of the effective index. The proposed device can be well suited for applications in photonic devices at real nanoscales. © 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.