Selective and optimal illumination of nano-photonic structures using optical eigenmodes

TL;DR

This paper introduces two optical eigenmode-based methods to optimize and selectively illuminate nano-photonic structures, enhancing hotspot coupling efficiency and reducing cross-talk in nano-antenna arrays.

Contribution

It presents novel methods based on optical eigenmodes for optimal and selective illumination of nano-antennas, improving coupling efficiency and minimizing cross-talk.

Findings

Two methods outperform traditional approaches in efficiency.

Optimal illumination enhances hotspot intensity.

Cross-talk is significantly reduced.

Abstract

Using optical eigenmodes defined by the interaction between the electromagnetic fields and photonic structures it is possible to determine the optimal illumination of these structures with respect to a specific measurable quantity. One such quantity considered here is the electric field intensity in the hotspot regions of an array of nano-antennas. This paper presents two possible methods, both based on optical eigenmodes, to determine the optimal and most efficient illumination that couples to a single hotspot on top of a single nano-antenna taken from an array of nano-antennas. The two methods are compared in terms of cross-talk and overall coupling efficiency.