摘要
Lithium niobate’s substantial nonlinear optical and electro-optic coefficients have recently thrust it into the limelight.This study presents a thorough review of bound states in the continuum(BICs)in lithium niobate metasurfaces,also suggesting their potential for sensing applications.We propose an all-dielectric tunable metasurface that offers high Q factor resonances in the terahertz range,triggered by symmetry-protected BICs.With exceptional sensitivity to changes in the refractive index of the surrounding medium,the metasurface can reach a sensitivity as high as 947 GHz/RIU.This paves the way for ultrasensitive tunable terahertz sensors,offering an exciting path for further research.
基金
National Natural Science Foundation of China(52105595)
Natural Science Foundation of Zhejiang Province(Q21F050011)。