Direct fiber-coupled single photon source based on a photonic crystal waveguide

Journal Article · Mon Aug 24 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4929838· OSTI ID:22489144

Ahn, Byeong-Hyeon; Lee, Chang-Min; Lim, Hee-Jin ^[1]; Schlereth, Thomas W.; Kamp, Martin ^[2]; Höfling, Sven ^[2]; Lee, Yong-Hee ^[1]

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1. Department of Physics, KAIST, Daejeon 305-701 (Korea, Republic of)
2. Technische Physik, Physikalisches Institut and Wilhelm Conrad Röntgen-Center for Complex Material Systems, Universität Würzburg, Am Hubland, D-97074 Würzburg (Germany)

A single photon source plays a key role in quantum applications such as quantum computers and quantum communications. Epitaxially grown quantum dots are one of the promising platforms to implement a good single photon source. However, it is challenging to realize an efficient single photon source based on semiconductor materials due to their high refractive index. Here we demonstrate a direct fiber coupled single photon source with high collection efficiency by employing a photonic crystal (PhC) waveguide and a tapered micro-fiber. To confirm the single photon nature, the second-order correlation function g{sup (2)}(τ) is measured with a Hanbury Brown-Twiss setup. The measured g{sup (2)}(0) value is 0.15, and we can estimate 24% direct collection efficiency from a quantum dot to the fiber.

• OSTI ID: 22489144
• Journal Information: Applied Physics Letters, Vol. 107, Issue 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CORRELATION FUNCTIONS
CRYSTALS
FIBERS
PHOTONS
QUANTUM COMPUTERS
QUANTUM DOTS
REFRACTIVE INDEX
SEMICONDUCTOR MATERIALS
WAVEGUIDES