Demonstration of a New Transport Regime of Photon in Two-dimensional Photonic Crystal

TL;DR

This paper demonstrates a novel photon transport regime in two-dimensional photonic crystals near the Dirac point, showing inverse proportionality of conductance to sample thickness and effects of disorder and interface tuning.

Contribution

It introduces a new photon transport regime in 2D photonic crystals near the Dirac point, with detailed numerical analysis of conductance behavior and disorder effects.

Findings

Photon conductance is inversely proportional to sample thickness.

Disorders reduce photon transmission, contrary to electron behavior in graphene.

Interface tuning can enhance photon conductance.

Abstract

A new transport regime of photon in two-dimensional photonic crystal near the Dirac point has been demonstrated by exact numerical simulation. In this regime, the conductance of photon is inversely proportional to the thickness of sample, which can be described by Dirac equation very well. Both of bulk and surface disorders always reduce the transmission, which is in contrast to the previous theoretical prediction that they increase the conductance of electron at the Dirac point of grephene. However, regular tuning of interface structures can cause the improvement of photon conductance. Furthermore, large conductance fluctuations of photon have also been observed, which is similar to the case of electron in graphene.