Exposing and extending the interior waves field by transformation materials

TL;DR

This paper introduces a transformation optics-based method to expose and extend the interior wave field in beam volumes, enabling direct detection and improved optical signal processing.

Contribution

It proposes a novel strategy to transform the interior wave space from one-dimensional to two-dimensional, enhancing detection capabilities in optical systems.

Findings

Successful application to quadratic graded index lens

Numerical demonstration of enhanced chirp detection

Potential for improved optical signal processing

Abstract

Based on transformation optics, a strategy is proposed to expose the inner one-dimensional space of a wave field inside a beam volume to the surface of the propagation medium and extend the space from one-dimensional to two-dimensional, allowing the corresponding field distribution to be detected directly and more subtly, which is important in optical signal processing. The method is applied to the quadratic graded index lens to construct a new graded index lens, and its enhanced chirpyness detection ability is demonstrated by numerical simulation.