Title: Goos-H$\ddot{a}$nchen shift of normally incident beam on magneto-optical meta-grating Show Chinese title

Title: 高斯-H$\ddot{a}$森移位在磁光超材料光栅上的正入射光束

Abstract: Goos-H$\ddot{a}$nchen shift of normally incident optical beam to meta-grating consisted of magneto-optical material are studied. The meta-grating is consisted of compound grating of magneto-optical rod on top of a dielectric slab, which induces zone-folding quasi-bound states in the continuum at the $\Gamma$ point with non-zero group velocity. By applying stationary-phase theory, the Goos-H$\ddot{a}$nchen shift of normally incident quasi-plane wave are found to be enhanced at the reflection peak. Simulations of normally incident Gaussian beam with finite beam width show that the Goos-H$\ddot{a}$nchen shift is dependent on the beam width. Show Chinese abstract

Abstract: Goos-H$\ddot{a}$nchen 通常入射的光束向由磁光材料组成的超晶格的偏移被研究。 超晶格由磁光杆在介质板上的复合光栅组成，在$\Gamma$点具有非零群速度，这在连续体中诱导了区域折叠准束缚态。 通过应用相位稳定理论，发现通常入射的准平面波的 Goos-H$\ddot{a}$nchen 偏移在反射峰处被增强。 对具有有限光束宽度的通常入射高斯光束的模拟显示，Goos-H$\ddot{a}$nchen 偏移取决于光束宽度。