四极形变微腔辐射的正则谱和普适方向性
Regular Spectra and Universal Directionality of Emitted Radiation from a Quadrupolar Deformed Microcavity
摘要：
通过大量的数值计算，研究了四极形变微腔的准本征模。发现其光谱结构是相当规则的，这可以用微腔是一个开放系统的事实来解释。模式的远场发射方向显示出意想不到的相似性，无论它们在相空间中的不同形状。这种普遍的方向性归因于相应的射线动力学中的不稳定流形的几何形状的影响。
英文摘要：
We have investigated quasi-eigenmodes of a quadrupolar deformed microcavity by extensive numerical calculations. The spectral structure is found to be quite regular, which can be explained on the basis of the fact that the microcavity is an open system. The far-field emission directions of the modes show unexpected similarity irrespective of their distinct shapes in phase space. This universal directionality is ascribed to the influence from the geometry of the unstable manifolds in the corresponding ray dynamics.
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