Strong coupling of in-plane plasmon modes and their control

TL;DR

This paper demonstrates strong in-plane plasmon mode coupling in a dielectric-metal-dielectric structure with a 2D dielectric pattern, showing controllable coupling strength via sample orientation and comparing experimental anti-crossing widths with coupled mode theory.

Contribution

It introduces a method to control plasmon coupling strength through sample orientation and validates it with experimental and theoretical analysis.

Findings

Anti-crossings observed in plasmon modes due to strong coupling.

Coupling strength can be tuned by sample orientation.

Experimental anti-crossing widths match coupled mode theory predictions.

Abstract

We show anti-crossings due to strong in-plane coupling of plasmon modes in dielectric-metal-dielectric structure with top 2D dielectric pattern. Experimentally measured anti-crossing widths are compared with those calculated by coupled mode theory. It is shown that the coupling strength of the plasmon modes can be controlled by the orientation of the sample.