Gaussian Beam Collimation via Transformation Media

TL;DR

This paper demonstrates how transformation media can convert a Gaussian beam into a plane wave-like beam within a few wavelengths, offering an innovative approach to beam collimation beyond traditional methods.

Contribution

It introduces a novel application of transformation optics for Gaussian beam collimation, providing design details and simulation validation.

Findings

Gaussian beam can be transformed into a plane wave-like beam

Transformation media achieve collimation within several wavelengths

Simulation results confirm the effectiveness of the approach

Abstract

Conventional method for Gaussian beam collimation is to expand the beam waist to achieve a smaller divergence angle. Recent transformation optics offers an unconventional path to control the electromagnetic field. In this paper we show that a Gaussian beam can be converted into a plane wave-like beam by transformation media within the scale of several wavelengths. Design details and full-wave simulation results via finite element method are provided.