Caustics due to Negative Refractive Index in Circular Graphene p-n Junctions

TL;DR

This paper demonstrates that wavefunctions in circular graphene p-n junctions create caustics, which can be explained using the concept of negative refractive index within geometrical optics.

Contribution

It introduces the interpretation of wavefunction caustics in graphene p-n junctions through negative refractive index concepts.

Findings

Wavefunctions form caustics in circular graphene p-n junctions

Caustics can be explained with negative refractive index

Provides a geometrical optics perspective on quantum wave behavior

Abstract

We show that the wavefunctions form caustics in circular graphene p-n junctions which in the framework of geometrical optics can be interpreted with negative refractive index.