The rigorous coupled-wave analysis of guided-mode resonance in dielectric gratings
介质光栅导模共振耦合波分析

Guided mode resonance in a dielectric grating results from a redistribution of energy in propagating waves when high\|order spatial harmonics are coupled to the leaky wave guide modes sustained by the grating. In this paper, we have analyzed the guided wave modes in a wave guide with a rigorous coupled wave approach. From the analyzed results, we have estimated properly the location of the guided mode resonance in a weakly modulated dielectric grating. We also discussed the relations among the guided mode resonance, grating layer thickness, substrate thickness, and the incident angle. By adopting a design for anti refection, the symmetric guided mode resonance with low side band was achieved.