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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 20, Iss. 9 — Sep. 1, 2003
  • pp: 1785–1791

Light emission from whispering-gallery modes in microscopic spheres

Michael J. Jory, Elaine A. Perkins, and J. Roy Sambles  »View Author Affiliations

JOSA A, Vol. 20, Issue 9, pp. 1785-1791 (2003)

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The emission of light from whispering-gallery modes excited in microscopic spheres is examined. An evanescent wave is produced by total internal reflection of an optical beam at a planar glass–air interface. This evanescent wave is used to excite whispering-gallery modes in single microscopic spheres placed behind the glass–air interface. The intensity of light emitted into the air half-space from such spheres is measured as a function of scattering angle for both p- and s-polarized input beams. These data are compared with a simple theory for the emission from a point source above a planar glass substrate.

© 2003 Optical Society of America

OCIS Codes
(230.5750) Optical devices : Resonators
(260.6970) Physical optics : Total internal reflection
(290.5850) Scattering : Scattering, particles

Original Manuscript: April 7, 2003
Manuscript Accepted: May 5, 2003
Published: September 1, 2003

Michael J. Jory, Elaine A. Perkins, and J. Roy Sambles, "Light emission from whispering-gallery modes in microscopic spheres," J. Opt. Soc. Am. A 20, 1785-1791 (2003)

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