Nanowire waveguides launching single photons in a Gaussian mode for ideal fiber coupling

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DOIResolve DOI: http://doi.org/10.1021/nl501648f
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TypeArticle
Journal titleNano Letters
ISSN1530-6984
Volume14
Issue7
Pages41024106; # of pages: 5
SubjectQuantum dot; nanowire; single photon emission; waveguide modes; Fourier microscopy
AbstractQuantum communication as well as integrated photonic circuits require single photons propagating in a well-defined Gaussian mode. However, tailoring the emission mode to a Gaussian remains an unsolved challenge for solid-state quantum emitters due to their random positioning in the host material or photonic structure. Here, we overcome these limitations by embedding a semiconductor quantum dot in a tapered nanowire waveguide. Owing to the deterministic positioning of the emitter in the waveguide, we demonstrate a Gaussian emission profile in the far field. Hence, we further couple the emission into a single-mode optical fiber with a record efficiency of 93%, thereby addressing a major hurdle for practical implementation of single photon sources in emerging photonic technologies.
Publication date
LanguageEnglish
AffiliationInformation and Communication Technologies; National Research Council Canada
Peer reviewedYes
NPARC number21272649
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Record identifierb8bb4646-d6fd-43e7-aaa1-e72cec4ef898
Record created2014-12-03
Record modified2016-05-09
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