Silicon nanocrystal luminescence coupled to whispering gallery modes in optical fibers

Oxide-embedded silicon nanocrystals (Si-NCs) are a promising material for microphotonics, particularly when coupled to high quality factor (Q-factor) optical cavity modes. By glazing smooth nanocrystalline films from a solution-based precursor onto the surface of optical fibers, the Si-NC luminescen...

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Bibliographic Details
Published in:Journal of applied physics 2009-01, Vol.105 (2)
Main Authors: Bianucci, P., Rodríguez, J. R., Clements, C. M., Veinot, J. G. C., Meldrum, A.
Format: Article
Language:English
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Summary:Oxide-embedded silicon nanocrystals (Si-NCs) are a promising material for microphotonics, particularly when coupled to high quality factor (Q-factor) optical cavity modes. By glazing smooth nanocrystalline films from a solution-based precursor onto the surface of optical fibers, the Si-NC luminescence can be strongly coupled into the optical modes of the fiber. Well-developed whispering gallery modes occur in the luminescence of the Si-NCs measured perpendicular to the fiber axis, showing detection-limited Q-factors in the emission spectrum. In addition to providing high Q-factor fluorescence without the need for lithographic procedures, the physical versatility of a nanocrystal-coated fiber suggests possible refractometric applications.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3072623