Light scattering by plasmonic disks and holes arrays: different or the same?

We suggest a strategy for designing regular 2D arrays of nanoholes (NHs) in metal films with far-field scattering properties similar to that of regular 2D arrays of nanodisks (NDs) with the same periodicity. Full-wave simulations for perfectly conducting, Ag and Au NDs and respectively designed arrays of NHs demonstrate a minor difference between far-field properties either at wavelengths corresponding to Wood-Rayleigh anomalies of the arrays or in a broad wavelength range, depending on the array periodicity and sizes of NDs (NHs). Our results have broad implications in plasmon-enhanced-driven applications, including optoelectronic and photovoltaic devices, where the NH arrays are preferable to be fabricated for nano-structured optics.

Automated summary

This study proposes a strategy for designing regular 2D arrays of nanoholes in metal films with far-field scattering properties similar to that of regular 2D arrays of nanodisks. Full-wave simulations show that there is a minor difference in far-field properties depending on the array periodicity and sizes of the nanodisks (nanoholes) at certain wavelengths or in a broad wavelength range. This study has important implications in plasmon-enhanced-driven applications.