Fig. 1: Chaotic cavity and circular microdisk cavity.

a Schematic of circular microdisk and its strong periodicity visualized by correlation function, b Schematic of chaotic cavity and its weak periodicity visualized by correlation function. The calculated PSOS, the corresponding ray trajectory in real space marked with different colors in PSOS, and supporting resonant modes of c, the circular microdisk cavity and d, the chaotic cavity, respectively