4:15 PM - 4:30 PM
▲ [20p-C304-10] Refractive index sensing via bound states in the continuum laser
Keywords:bound states in the continuum, metasurfaces
In this research, a refractive index sensing based on quasi-bound states in the continuum (Q-BIC) at visible wavelength was demonstrated. Via internal excitation, Q-BIC can lase at the resonance wavelength, and the FWHM can much smaller than the reflectance resonance peak; thus, the FoM can be extensively improved. This Q-BIC sensing structure achieves a sensitivity of 191.91 nm/RIU and FoM is 611.47 on experiment.