title: Inherent polarization entanglement generated from a monolithic semiconductor chip.
abstract: Creating miniature chip scale implementations of optical quantum information protocols is a dream for many in the quantum optics community. This is largely because of the promise of stability and scalability. Here we present a monolithically integratable chip architecture upon which is built a photonic device primitive called a Bragg reflection waveguide (BRW). Implemented in gallium arsenide, we show that, via the process of spontaneous parametric down conversion, the BRW is capable of directly producing polarization entangled photons without additional path difference compensation, spectral filtering or post-selection. After splitting the twin-photons immediately after they emerge from the chip, we perform a variety of correlation tests on the photon pairs and show non-classical behaviour in their polarization. Combined with the BRW's versatile architecture our results signify the BRW design as a serious contender on which to build large scale implementations of optical quantum processing devices.
authors.affiliation: Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, 200 University Avenue W, Waterloo, Ontario, N2L 3G1, Canada.
authors.forename: Rolf T
authors.initials: RT
authors.lastname: Horn
authors.forename: Piotr
authors.initials: P
authors.lastname: Kolenderski
authors.forename: Dongpeng
authors.initials: D
authors.lastname: Kang
authors.forename: Payam
authors.initials: P
authors.lastname: Abolghasem
authors.forename: Carmelo
authors.initials: C
authors.lastname: Scarcella
authors.forename: Adriano
authors.initials: A
authors.lastname: Della Frera
authors.forename: Alberto
authors.initials: A
authors.lastname: Tosi
authors.forename: Lukas G
authors.initials: LG
authors.lastname: Helt
authors.forename: Sergei V
authors.initials: SV
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authors.initials: JE
authors.lastname: Sipe
authors.forename: Gregor
authors.initials: G
authors.lastname: Weihs
authors.forename: Amr S
authors.initials: AS
authors.lastname: Helmy
authors.forename: Thomas
authors.initials: T
authors.lastname: Jennewein
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