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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 8 — Mar. 10, 2012
  • pp: 1101–1108

Resonance shifts of transverse-electric whispering gallery modes in a spheroidal resonator

Iwao Teraoka  »View Author Affiliations


Applied Optics, Vol. 51, Issue 8, pp. 1101-1108 (2012)
http://dx.doi.org/10.1364/AO.51.001101


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Abstract

A variational method was applied to find the wave function of a transverse-electric whispering gallery mode (WGM) in a spheroidal resonator of a uniform refractive index (RI). It was found that the electric field is tangential to the resonator surface as in the sphere, up to the linear order of the ellipticity. Using the wave function, the resonance shift due to adsorption of a thin, uniform dielectric layer onto the surface and the shift by a uniform RI change in the surroundings were evaluated in the perturbation theory. The shift by the RI change is not affected by the ellipticity, but the shift by the layer adsorption now depends on the meridional order. However, the correction is not large unless the ellipticity is large and the meridional order is away from the one for the equatorial mode of WGM.

© 2012 Optical Society of America

OCIS Codes
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation
(230.5750) Optical devices : Resonators
(260.2110) Physical optics : Electromagnetic optics

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: September 28, 2011
Revised Manuscript: December 20, 2011
Manuscript Accepted: December 23, 2011
Published: March 7, 2012

Citation
Iwao Teraoka, "Resonance shifts of transverse-electric whispering gallery modes in a spheroidal resonator," Appl. Opt. 51, 1101-1108 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-8-1101

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