Extraordinary transmission of nanohole lattices in gold films

TL;DR

This paper investigates how nanohole lattices in gold films can significantly enhance light transmission at specific wavelengths, combining experimental observations with numerical simulations and exploring spectral manipulation in complex lattice structures.

Contribution

It provides new insights into extraordinary optical transmission through nanohole lattices and demonstrates spectral control using quasi-periodic and chirped designs.

Findings

Periodic nanohole lattices enhance light transmission at specific wavelengths.

Finite-difference time-domain simulations agree with experimental results.

Spectral transmission can be manipulated using quasi-periodic and chirped lattices.

Abstract

We study experimentally the transmission of light through a square lattice of nanoholes perforated in a optically-thick gold film. We observe that the periodicity of the structure enhances the light transmission for specific wavelengths, and we analyze this effect theoretically by employing finite-difference time-domain numerical simulations. Furthermore, we investigate the possibilities for manipulation of the spectral transmission in quasi-periodic and chirped lattices consisting of square nanoholes with varying hole size or lattice periodicity.