# Transmission of plasmons through a nanowire

## TL;DR

This paper investigates how plasmons propagate through monocrystalline gold nanowires on glass, demonstrating that transmission exhibits Fabry-Pérot oscillations and can be accurately modeled analytically.

## Contribution

It provides a quantitative analytical model for plasmon transmission in nanowires, validated by experiments and simulations, advancing understanding for nanophotonic device design.

## Key findings

- Transmission shows Fabry-Pérot oscillations.
- Experimental and simulated data agree with the analytical model.
- Transmission depends on nanowire length and excitation conditions.

## Abstract

Exact quantitative understanding of plasmon propagation along nanowires is mandatory for designing and creating functional devices. Here we investigate plasmon transmission through top-down fabricated monocrystalline gold nanowires on a glass substrate. We show that the transmission through finite-length nanowires can be described by Fabry-P\'{e}rot oscillations that beat with free-space propagating light launched at the incoupling end. Using an extended Fabry-P\'{e}rot model, experimental and simulated length dependent transmission signals agree quantitatively with a fully analytical model.