Unidirectional lasing from a microcavity with a rounded isosceles triangle shape |
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Authors: | Kurdoglyan M S Lee Soo-Young Rim Sunghwan Kim Chil-Min |
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Affiliation: | National Creative Research Initiative Center for Controlling Optical Chaos, Pai-Chai University, Daejeon 302-735, South Korea. |
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Abstract: | We report that unidirectional lasing emission can be generated from a rounded isosceles triangular microcavity within a low nkD range, where n is the refractive index, k is the vacuum wave number, and D is the characteristic size of the microcavity. It is shown that unidirectional resonance modes have relatively high-Q values and in a nonlinear dynamic model appear as stationary lasing solutions with a low threshold. The formation of a whispering-gallery-type pattern along the rounded part on the symmetry axis is responsible for the unidirectionality of the resonances. |
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