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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 14 — Jul. 15, 2014
  • pp: 4196–4199

Abnormal high-Q modes of coupled stadium-shaped microcavities

Jung-Wan Ryu, Soo-Young Lee, Inbo Kim, Muhan Choi, Martina Hentschel, and Sang Wook Kim  »View Author Affiliations


Optics Letters, Vol. 39, Issue 14, pp. 4196-4199 (2014)
http://dx.doi.org/10.1364/OL.39.004196


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Abstract

It is well known that the strongly deformed microcavity with fully chaotic ray dynamics cannot support high-Q modes due to its fast chaotic diffusion to the critical line of refractive emission. Here, we investigate how the Q factor is modified when two chaotic cavities are coupled, and show that some modes, whose Q factor is about 10 times higher than that of the corresponding single cavity, can exist. These abnormal high-Q modes are the result of an optimal combination of coupling and cavity geometry. As an example, in the coupled stadium-shaped microcavities, the mode pattern extends over both cavities such that it follows a whispering-gallery-type mode at both ends, whereas a big coupling spot forms at the closest contact of the two microcavities. The pattern of such a “rounded bow tie” mode allows the mode to have a high-Q factor. This mode pattern minimizes the leakage of light at both ends of the microcavities as the pattern at both ends is similar to the whispering gallery mode.

© 2014 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(140.4780) Lasers and laser optics : Optical resonators
(140.3945) Lasers and laser optics : Microcavities

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: April 21, 2014
Revised Manuscript: May 26, 2014
Manuscript Accepted: June 14, 2014
Published: July 10, 2014

Citation
Jung-Wan Ryu, Soo-Young Lee, Inbo Kim, Muhan Choi, Martina Hentschel, and Sang Wook Kim, "Abnormal high-Q modes of coupled stadium-shaped microcavities," Opt. Lett. 39, 4196-4199 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-14-4196


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