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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 34, Iss. 13 — Jul. 1, 2009
  • pp: 2057–2059

Spectroscopy of coherently coupled whispering-gallery modes in size-matched bispheres assembled on a substrate

Seungmoo Yang and Vasily N. Astratov  »View Author Affiliations


Optics Letters, Vol. 34, Issue 13, pp. 2057-2059 (2009)
http://dx.doi.org/10.1364/OL.34.002057


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Abstract

Coupling between whispering-gallery modes is studied using imaging spectroscopy in pairs of size-selected (size deviation of < 0.03 % ) spheres in a touching position. In a special geometrical configuration, peculiar shapes resembling kites are observed in the spectral images of bispheres by coupling of multiple pairs of azimuthal modes. The maximal WGM coupling is observed in the equatorial plane of spheres determined by the substrate. The WGM coupling constant is quantified for spheres from 2.9 to 6 μ m for such modes.

© 2009 Optical Society of America

OCIS Codes
(230.5750) Optical devices : Resonators
(350.3950) Other areas of optics : Micro-optics
(230.4555) Optical devices : Coupled resonators

ToC Category:
Optical Devices

History
Original Manuscript: March 23, 2009
Revised Manuscript: May 10, 2009
Manuscript Accepted: May 12, 2009
Published: June 29, 2009

Citation
Seungmoo Yang and Vasily N. Astratov, "Spectroscopy of coherently coupled whispering-gallery modes in size-matched bispheres assembled on a substrate," Opt. Lett. 34, 2057-2059 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-13-2057


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