2013/04/17 by Rolf T. Horn, Piotr Kolenderski, Dongpeng Kang +12 · 108 citations
Chemistry · Computer Science · Engineering · Physics and Astronomy · #Chemistry #Chip #Computer science #Electronic engineering #Engineering #Neural Networks and Reservoir Computing #Optics #Optoelectronics #Photon #Photonic and Optical Devices #Photonics #Physics #Polarization (electrochemistry) #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum mechanics #Scalability #Telecommunications #quant-ph
paper · pdf · doi:10.1038/srep02314
published in Scientific Reports 3(1), 2314 (Nature Portfolio)
arxiv created 2013/04/17 · openalex publication_date 2013/07/30 · arxiv updated 2014/06/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.