Full transmission through perfect-conductor subwavelength hole arrays

TL;DR

This paper demonstrates that perfect-conductor subwavelength hole arrays can achieve complete light transmission at certain resonant wavelengths, supported by analytical proofs and numerical solutions, highlighting the importance of dynamical diffraction.

Contribution

It provides an analytical and numerical demonstration of full transmission through subwavelength hole arrays in perfect conductors, emphasizing the role of dynamical diffraction.

Findings

Complete transmission at resonant wavelengths even for narrow holes

Total reflection at specific wavelengths regardless of scatterer strength

Analytical and numerical validation of the phenomena

Abstract

Light transmission through 2D subwavelength hole arrays in perfect-conductor films is shown to be complete (100%) at some resonant wavelengths even for arbitrarily narrow holes. Conversely, the reflection on a 2D planar array of non-absorbing scatterers is shown to be complete at some wavelengths regardless how weak the scatterers are. These results are proven analytically and corroborated by rigorous numerical solution of Maxwell's equations. This work supports the central role played by dynamical diffraction during light transmission through subwavelength hole arrays and it provides a systematics to analyze more complex geometries and many of the features observed in connection with transmission through hole arrays.