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Phys Rev Lett. 2003 Jul 18;91(3):033902. Epub 2003 Jul 17.

Directional tunneling escape from nearly spherical optical resonators.

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Department of Physics, University of Oregon, Eugene, Oregon 97403, USA.


We report the surprising observation of directional tunneling escape from nearly spherical fused-silica optical resonators, in which most of the phase space is filled with nonchaotic regular trajectories. Experimental and theoretical studies of the dependence of the far-field emission pattern on both the degree of deformation and the excitation condition show that nonperturbative phase-space structures in the internal ray dynamics profoundly affect tunneling leakage of the whispering-gallery modes.

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