Directional Emission from a Microdisk Resonator with a Linear Defect

Details Directional Emission from a Microdisk Resonator with a Linear Defect Directional Emission from a Microdisk Resonator with a Linear Defect

2002-03-10

arxiv.org/abs/cond-mat/0203220v1

Phys. Rev. B 70, 195317 (2004)

Physics

Condensed Matter

6 pages including 2 figures

Scientific paper

Microdisk resonator with a linear defect at some distance away from the circumference is studied theoretically. We demonstrate that the presence of the defect leads to ({\em i}) enhancement of the output efficiency, and ({\em ii}) directionality of the outgoing light. The dependence of the radiative losses and of the far-field distribution on the position and orientation of the defect are calculated. The angular dependence of the far field is given by a lorentzian with a width that has a sharp minimum for a certain optimal orientation of the defect line. For this orientation the whispering-gallery mode of a circular resonator is scattered by the extended defect in the direction normal to the disk boundary.

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