# Graphene coated subwavelength wires: A theoretical investigation of emission and radiation properties

## TL;DR

This paper theoretically investigates how embedding a single optical emitter in a graphene-coated subwavelength wire can significantly enhance emission and radiation properties, with potential applications in nanophotonics.

## Contribution

It provides a detailed analysis of emission and radiation modifications due to graphene coating, highlighting resonance effects and dipole orientation impacts.

## Key findings

- Emission rates can be enhanced by several orders of magnitude at resonance frequencies.
- High-order plasmon resonances are excited when the emitter is off-center.
- Dipole orientation affects near-field and far-field emission patterns.

## Abstract

This work analyzes the emission and radiation properties of a single optical emitter embedded in a graphene-coated subwavelength wire. We discuss the modifications of the spontaneous emission rate and the radiation efficiency as a function of the position and orientation of the dipole inside the wire. Our results show that these quantities can be enhanced by several orders of magnitude when the emission frequency coincides with one of the resonance frequencies of the graphene-coated wire. In particular, high-order plasmon resonances are excited when the emitter is moved from the wire center. The modifications by varying the orientation of the dipole in the near field distribution and in the far field intensities are shown.