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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 7 — Apr. 8, 2013
  • pp: 8939–8944

Metallic diffraction grating enhanced coupling in whispering gallery resonator

Yanyan Zhou, Xia Yu, Haixi Zhang, and Feng Luan  »View Author Affiliations


Optics Express, Vol. 21, Issue 7, pp. 8939-8944 (2013)
http://dx.doi.org/10.1364/OE.21.008939


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Abstract

For the first time, metallic diffraction grating is investigated to enable efficient coupling in the whispering gallery resonator (WGR). Six-fold field enhancement in the resonator is achieved with respect to their dielectric counter-parts. This higher coupling efficiency is attributed to the surface plasmon excitation which drives the whispering gallery mode along the grating. Fano resonances have been observed in optical reflection. With the metallic grating, single-port end-fire WGR configuration becomes possible - a scheme that has not been demonstrated in any other WGR coupling devices. Hence, it serves as a prototype for portable whispering gallery devices potentially useful in sensing, switching and nonlinear applications.

© 2013 OSA

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(060.2310) Fiber optics and optical communications : Fiber optics
(250.4390) Optoelectronics : Nonlinear optics, integrated optics

ToC Category:
Diffraction and Gratings

History
Original Manuscript: February 5, 2013
Revised Manuscript: March 25, 2013
Manuscript Accepted: March 25, 2013
Published: April 4, 2013

Citation
Yanyan Zhou, Xia Yu, Haixi Zhang, and Feng Luan, "Metallic diffraction grating enhanced coupling in whispering gallery resonator," Opt. Express 21, 8939-8944 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-7-8939


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