We investigate resonance patterns in a stadium-shaped microcavity around nckR10, where nc is the refractive index, k the vacuum wave number, and R the radius of the circular part of the cavity. We find that the patterns of high-Q resonances can be classified, even though the classical dynamics of the stadium system is chaotic. The patterns of the high-Q resonances are consistent with ray dynamical considerations and appear as stationary lasing modes with low pumping rate in a nonlinear dynamical model. All resonance patterns are presented in a finite range of $kR$.
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Lee et al. (2004) studied this question.
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