Proposal for an electrically controlled terahertz micro-oscillator

TL;DR

This paper proposes a voltage-controlled terahertz micro-oscillator using a nanocomposite with metal nanorods and graphene, capable of generating polarized terahertz radiation suitable for biomedical and security uses.

Contribution

It introduces a novel electrically controlled terahertz source based on nanocomposite and graphene structures, enabling tunable and monochromatic radiation.

Findings

Design demonstrates positive feedback for sustained oscillation

Capable of producing polarized terahertz radiation

Suitable for biomedical and security applications

Abstract

A source which generates sustained terahertz electromagnetic radiation (oscillator) controllable by an applied voltage is proposed. The structure consists of a nanocomposite slab containing metal nanorods enclosed between two graphene sheets which are electrostatically gated. The principle of its operation is based on a positive feedback which the nanorods polarization experiences from the radiation reflected by the graphene mirrors. The proposed approach can provide a microscopic source of monochromatic polarized terahertz radiation of power sufficient for biomedical and security applications.