Fig. 5: Investigation of the capacitively-driven Friedrich–Wintgen (FW-) bound states in the continuum (BICs). | Communications Physics

Fig. 5: Investigation of the capacitively-driven Friedrich–Wintgen (FW-) bound states in the continuum (BICs).

From: Polarization-selective modulation of supercavity resonances originating from bound states in the continuum

Fig. 5

a Simulated transmission spectra for different capacitive gap “c”, showing an avoided crossing and linewidth vanishing due to the hybridization of dipole and quadrupole modes. The dotted circle indicates the FW-BIC position with vanishing linewidth. b Contour plot illustrating the transmission amplitude for different values of the capacitive gap between 40 and 100 μm respectively. A fit was applied to the data with Jaynes–Cummings (JC) Hamiltonian to calculate Rabi splitting parameter, ΩR. c Quality (Q-) factor vs. capacitive gap calculated from simulation (Sim) data. The FW-BIC appears at c = 78 μm where Q approaches ∞. Under similar conditions of simulation, error bars are smaller than data points and are imperceptible to be represented here.

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