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Title: Two-photon interference and coherent control of single InAs quantum dot emissions in an Ag-embedded structure

We have recently reported the successful fabrication of bright single-photon sources based on Ag-embedded nanocone structures that incorporate InAs quantum dots. The source had a photon collection efficiency as high as 24.6%. Here, we show the results of various types of photonic characterizations of the Ag-embedded nanocone structures that confirm their versatility as regards a broad range of quantum optical applications. We measure the first-order autocorrelation function to evaluate the coherence time of emitted photons, and the second-order correlation function, which reveals the strong suppression of multiple photon generation. The high indistinguishability of emitted photons is shown by the Hong-Ou-Mandel-type two-photon interference. With quasi-resonant excitation, coherent population flopping is demonstrated through Rabi oscillations. Extremely high single-photon purity with a g{sup (2)}(0) value of 0.008 is achieved with π-pulse quasi-resonant excitation.
Authors:
 [1] ;  [2] ; ; ; ; ;  [1] ;  [3]
  1. Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021 (Japan)
  2. (Japan)
  3. National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044 (Japan)
Publication Date:
OSTI Identifier:
22308917
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CORRELATION FUNCTIONS; EFFICIENCY; EMISSION; EXCITATION; IMPURITIES; INDIUM ARSENIDES; INHIBITION; INTERFERENCE; NANOPARTICLES; OSCILLATIONS; PHOTONS; PULSES; QUANTUM DOTS; SILVER