Enhanced coupling to whispering gallery modes by two-photon absorption induced by a highly focused field

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/5391

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Title: Enhanced coupling to whispering gallery modes by two-photon absorption induced by a highly focused field
Author(s): Kuriakose, Smitha; Morrish, Dru; Gan, Xiaosong; Chon, James W.; Gu, Min
Abstract: The authors report on enhanced coupling to whispering gallery modes in fluorescent polystyrene microspheres using two-photon absorption induced by a highly focused field. Due to the highly confined excitation nature under focused evanescent illumination achieved by a circularly obstructed beam, the whispering gallery modes can be excited within a small volume near the perimeter of the microsphere. As a result, the visibility, the Q factor, and the degree of polarization of the fluorescence spectra induced in the microsphere are enhanced by 60%, 37%, and five times, respectively.
Publication type: Journal article
Research centre: Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics
Source: Applied Physics Letters, Vol. 89, no. 21 (2006), article no. 211125
Publication year: 2006
Keyword(s): Whispering gallery modes; Two-photon spectra; Fluorescence; Optical polymers; Optical focusing; Q-factor; Light polarisation
Publisher: American Institute of Physics
ISSN: 0003-6951
Publisher URL: http://dx.doi.org/10.1063/1.2397036
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