期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.153605
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资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canadian Institute For Advanced Research (CIFAR)
- Canadian Foundation for Innovation (CFI)
- Canadian Research Chair (CRC)
- ERA
- Ontario Center for Excellence
- Quantum Works
- Institute for Quantum Computing (IQC)
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 X 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.
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