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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: G. I. Stegeman
  • Vol. 23, Iss. 11 — Nov. 1, 2006
  • pp: 2361–2365

Effect of a dielectric substrate on whispering-gallery-mode sensors

Nicolas Le Thomas, Ulrike Woggon, Wolfgang Langbein, and Mikhail V. Artemyev  »View Author Affiliations

JOSA B, Vol. 23, Issue 11, pp. 2361-2365 (2006)

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The effect of a dielectric substrate on whispering-gallery-mode (WGM)-based devices is experimentally investigated and theoretically quantified for spherical dielectric microresonators with 5 μ m diameter. The interaction with a dielectric substrate yields a homogeneous broadening with a threshold-like behavior versus the azimuthal quantum number, which is accompanied by an energy renormalization of about 20% of the broadening. The WGM orbital planes of narrowest spectral linewidth (close to the Mie value) in the presence of a substrate are identified, and the consequences for the scattering spectrum analysis of microsphere devices relying on high-Q factors are discussed.

© 2006 Optical Society of America

OCIS Codes
(110.0180) Imaging systems : Microscopy
(230.5750) Optical devices : Resonators
(260.6970) Physical optics : Total internal reflection
(290.4020) Scattering : Mie theory
(350.3950) Other areas of optics : Micro-optics

ToC Category:
Optical Devices

Original Manuscript: March 31, 2006
Manuscript Accepted: July 21, 2006

Virtual Issues
Vol. 1, Iss. 12 Virtual Journal for Biomedical Optics

Nicolas Le Thomas, Ulrike Woggon, Wolfgang Langbein, and Mikhail V. Artemyev, "Effect of a dielectric substrate on whispering-gallery-mode sensors," J. Opt. Soc. Am. B 23, 2361-2365 (2006)

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