Antisymmetric entangled two-photon states generated in nonlinear GaN/AlN photonic-band-gap structures

TL;DR

This paper investigates antisymmetric two-photon entangled states generated in GaN/AlN photonic structures, highlighting their unique temporal anti-bunching and anti-correlation properties, with two proposed generation schemes.

Contribution

It introduces two novel methods for generating antisymmetric entangled two-photon states using nonlinear GaN/AlN photonic-band-gap structures.

Findings

Photons are perfectly anti-correlated at a beam-splitter.

Generated states exhibit temporal anti-bunching.

Two schemes for state generation are described.

Abstract

The properties of an entangled two-photon state antisymmetric in frequencies are studied. At a beam-splitter, two entangled photons are perfectly anti-correlated. In addition, they cannot be detected at the same time instant despite the fact that their detection times are confined to a narrow time window, i.e. they are temporally anti-bunched. Using nonlinear photonic-band-gap structures made of GaN/AlN, two schemes for generating such states are described.