Single quantum dot spectroscopy using a fiber taper waveguide near-field optic

Photoluminescence spectroscopy of single InAs quantum dots at cryogenic temperatures (∼14K) is performed using a micron-scale optical fiber taper waveguide as a near-field optic. A lower bound on the measured collection efficiency of quantum dot spontaneous emission into the fundamental guided mode...

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Bibliographic Details
Published in:Applied physics letters 2007-08, Vol.91 (9)
Main Authors: Srinivasan, Kartik, Painter, Oskar, Stintz, Andreas, Krishna, Sanjay
Format: Article
Language:English
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Summary:Photoluminescence spectroscopy of single InAs quantum dots at cryogenic temperatures (∼14K) is performed using a micron-scale optical fiber taper waveguide as a near-field optic. A lower bound on the measured collection efficiency of quantum dot spontaneous emission into the fundamental guided mode of the fiber taper is estimated at 0.1%, and spatially resolved measurements with ∼600nm resolution are obtained by varying the taper position with respect to the sample and using the fiber taper for both the pump and collection channels.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2775811