Fig. 1: BIC in an open acoustic resonator. | Nature Communications

Fig. 1: BIC in an open acoustic resonator.

From: Sound trapping in an open resonator

Fig. 1

a Symmetry-protected BIC. b Transmission spectra evolution as structure asymmetry is introduced. When the asymmetry ratio decreases to 0 (black curve), ideal BIC occurs. c Friedrich–Wintgen BIC induced by mode interferences. d Resonant frequency of high-Q and low-Q modes as a function of size ratio of the open resonator. e Mirror-induced BIC for mirror along the x-axis. f Mirror-induced BIC for mirror along the y-axis.

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