17 February 2010 Evanescent waves outside eccentric optical cavities
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Proceedings Volume 7579, Laser Resonators and Beam Control XII; 757916 (2010) https://doi.org/10.1117/12.841664
Event: SPIE LASE, 2010, San Francisco, California, United States
It is described how strongly directional emission may be achieved from whispering gallery modes in optical resonators which are only very slightly deformed from spherical or circular geometry. A theoretical description is offered which uses an extension of eikonal approximation to complex ray families. Natural boundaries arise in the complexified ray families which prevents direct application of ray-theoretical methods. By treating the ray dynamics perturbatively, however, it may be possible to obtain explicit approximation of the exterior field for sufficiently weakly deformed resonators.
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Stephen C. Creagh, Stephen C. Creagh, Michael White, Michael White, } "Evanescent waves outside eccentric optical cavities", Proc. SPIE 7579, Laser Resonators and Beam Control XII, 757916 (17 February 2010); doi: 10.1117/12.841664; https://doi.org/10.1117/12.841664

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