期刊
OPTICS LETTERS
卷 34, 期 19, 页码 2915-2917出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.34.002915
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- Natural Sciences and Engineering Research Council of Canada
- Fonds de recherche sur la nature et les technologies
- Canadian Institute for Photonic Innovations
We report on the achievement of strong coherent emission from GaAs-based single-walled spiral microtubes, wherein photons are localized in an ultrathin (similar to lambda/25) region embedded with self-organized InGaAs quantum dots. The emission spectra measured at 300 K are characterized by a regular sequence of sharp optical modes with a maximum Q factor of similar to 2500 and separation of similar to 7 meV. The three-dimensional confinement of photons is made possible by the epitaxially smooth tube surface as well as an engineered surface geometry, achieved using a single photolithography step. The experimental results are analyzed using an equivalent planar dielectric waveguide model. (C) 2009 Optical Society of America
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