Generation of entangled photons using an arrayed waveguide grating

TL;DR

This paper presents an integrated on-chip source of high-dimensional entangled photon pairs using an arrayed waveguide grating, demonstrating entanglement in a silicon-silica platform for quantum communication.

Contribution

It introduces a novel integrated device that generates and multiplexes entangled photons in multiple dimensions on a chip, advancing scalable quantum photonic technologies.

Findings

Successful generation of two-dimensional entanglement

Implementation on a silicon-silica platform

Proof-of-principle experimental validation

Abstract

We propose an on-chip source of entangled photon pairs that uses an arrayed-waveguide grating (AWG) with multiple nonlinear input waveguides as correlated photon pair sources. The AWG wavelength-demultiplexes photon pairs created in input waveguides and simultaneously produces a high-dimensional entangled state encoded in the optical path. We implemented the device with a monolithic silicon-silica waveguide integration platform and demonstrated the entanglement of two dimensions in a proof-of-principle experiment.