Monolithic source of photon pairs

The creation of monolithically integratable sources of single and entangled photons is a top research priority with formidable challenges: The production, manipulation, and measurement of the photons should all occur in the same material platform, thereby fostering stability and scalability. Here we...

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Bibliographic Details
Published in:Physical review letters 2012-04, Vol.108 (15), p.153605-153605, Article 153605
Main Authors: Horn, Rolf, Abolghasem, Payam, Bijlani, Bhavin J, Kang, Dongpeng, Helmy, A S, Weihs, Gregor
Format: Article
Language:English
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Summary:The creation of monolithically integratable sources of single and entangled photons is a top research priority with formidable challenges: The production, manipulation, and measurement of the photons should all occur in the same material platform, thereby fostering stability and scalability. Here we demonstrate efficient photon pair production in a semiconductor platform, gallium arsenide. Our results show type-I spontaneous parametric down-conversion of laser light from a 2.2 mm long Bragg-reflection waveguide, and we estimate its internal pair production efficiency to be 2.0×10(-8) (pairs/pump photon). This is the first time that significant pair production has been demonstrated in a structure that can be electrically self-pumped and which can form the basis for passive optical circuitry, bringing us markedly closer to complete integration of quantum optical technologies.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.108.153605