# Polarization properties of subwavelength hole arrays consisting of rectangular holes

## TL;DR

This study investigates how the shape and orientation of rectangular holes in subwavelength arrays influence optical transmission and polarization states, revealing tunable transmission and polarization conversion linked to hole aspect ratio.

## Contribution

It introduces a novel understanding of polarization control via hole shape and orientation in subwavelength arrays, supported by an intuitional model.

## Key findings

- Transmission can be continuously tuned by rotating the array.
- A phase related to hole aspect ratio affects polarization states.
- Linear polarization can be converted to elliptical polarization.

## Abstract

Influence of hole shape on extraordinary optical transmission was investigated using hole arrays consisting of rectangular holes with different aspect ratio. It was found that the transmission could be tuned continuously by rotating the hole array. Further more, a phase was generated in this process, and linear polarization states could be changed to elliptical polarization states. This phase was correlated with the aspect ratio of the holes. An intuitional model was presented to explain these results.