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

Journal Article · Mon Jul 28 04:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4891224· OSTI ID:22308917

Kumano, H.; Nakajima, H.; Odashima, S.; Asano, T.; Suemune, I. ^[1]; Kuroda, T. ^[2]

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1. Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021 (Japan)
2. National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044 (Japan)

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.

• OSTI ID: 22308917
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 4 Vol. 116; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CORRELATION FUNCTIONS
EFFICIENCY
EMISSION
EXCITATION
IMPURITIES
INDIUM ARSENIDES
INHIBITION
INTERFERENCE
NANOPARTICLES
OSCILLATIONS
PHOTONS
PULSES
QUANTUM DOTS
SILVER