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Fig. 5 | eLight

Fig. 5

From: Conformal optical black hole for cavity

Fig. 5

WGM fields in the conformal OBH cavity and homogeneous cavity. The refractive index distribution for (a\(_1\)) the quadrupole OBH cavity and (a\(_2\)) the peanut-like OBH cavity. The maximal refractive index of quadrupole and peanut-like cavity is truncated as 27 to avoid index divergence in the core region. The typical WGM field patterns with resonant mode-number m = 4 of (b\(_1\)) the quadrupole OBH cavity and (b\(_2\)) the peanut-like OBH cavity. Typical WGM field patterns of (c\(_1\)) the homogeneous quadrupole cavity and (c\(_2\)) peanut-like cavity. The resonant frequency is \(\sim\) 4.8 GHz and \(\sim\) 7.3 GHz for quadrupole cavity and peanut-like cavity, respectively

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