Two types of bound states in continuum(BICs),symmetry-protected and Brillouin zone folding driven,are identified in hollow Si nanorod *** modulating the direction and distance of the air holes from the center of the n...
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Two types of bound states in continuum(BICs),symmetry-protected and Brillouin zone folding driven,are identified in hollow Si nanorod *** modulating the direction and distance of the air holes from the center of the nanorods,it is possible to achieve either a single quasi-BIC or three *** transmission spectra exhibit ultra-narrow lines,and the quasi-BICs demonstrate ultra-high Q ***,efficient third-harmonic generation occurs at low pump *** results indicate that the proposed nanostructures of two types of BICs with a flexible modulation hold great potential applications for nonlinear photonic devices.
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