Efficient single photon source based on mu-fibre-coupled tunable microcavity

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Efficient and fast on-demand single photon sources have been sought after as critical components of quantum information science. We report an efficient and tunable single photon source based on an InAs quantum dot (QD) embedded in a photonic crystal cavity coupled with a highly curved mu-fibre. Exploiting evanescent coupling between the mu-fibre and the cavity, a high collection efficiency of 23% and Purcell-enhanced spontaneous emissions are observed. In our scheme, the spectral position of a resonance can be tuned by as much as 1.5 nm by adjusting the contact position of the mu-fibre, which increases the spectral coupling probability between the QD and the cavity mode. Taking advantage of the high photon count rate and the tunability, the collection efficiencies and the decay rates are systematically investigated as a function of the QD-cavity detuning.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2015-09
Language
English
Article Type
Article
Citation

SCIENTIFIC REPORTS, v.5

ISSN
2045-2322
DOI
10.1038/srep14309
URI
http://hdl.handle.net/10203/205601
Appears in Collection
PH-Journal Papers(저널논문)
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