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

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.
Authors:
; ;  [1] ; ;  [2] ;  [2] ;  [3] ;  [1] ;  [4]
  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)
  3. (United Kingdom)
  4. (WCU), KAIST, Daejeon 305-701 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22489144
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CORRELATION FUNCTIONS; CRYSTALS; FIBERS; PHOTONS; QUANTUM COMPUTERS; QUANTUM DOTS; REFRACTIVE INDEX; SEMICONDUCTOR MATERIALS; WAVEGUIDES