针对通信波段设计并制作了楔形波导层的导模共振滤波片（GMRF），分析并研究了其光谱特性。采用三角掩模板的方法进行离子束刻蚀，刻蚀一定次数后获得楔形波导层。光栅线条方向分为平行于和垂直于楔形波导层变化的方向。实验结果表明，对于两种结构，共振峰的位置与滤波片上的位置呈近似线性关系。光栅刻槽平行于楔形层变化的方向时共振峰的半峰全宽较光栅刻槽垂直于楔形层变化的方向时大。最终在20 mm的样品上，获得了线性渐变的Ta2O5楔形薄膜，其反射谱在1560~1600 nm范围内近似于线性变化。

本文研究了单层膜多模导模共振滤光片的电场增强效应。单层膜导模共振滤光片同时兼具波导和相位匹配功能的物理机制得到了论证。当光栅厚度不断增加将出现多模共振效应, 导致高阶泄漏模电场增强效应的产生。电场增强振幅的最大值反映导模共振滤光片的泄漏程度。通常在同一共振位置处电场增强振幅的最大值越大, 其带宽就越小。

A guided-mode resonance (GMR) filter with the same material (Ta2O5) for both the grating layer and the waveguide layer is designed and fabricated. This simple structure is easy to fabricate and can avoid the defects at the grating/waveguide interface using different materials. The spectral response measured with a Lambda 900 spectrophotometer under normal incidence for TE waves exhibits a peak reflectance exceeding 80% at the wavelength of 1040 nm with a full-width half-maximum (FWHM) linewidth of 23 nm. We evaluate the deviations of the fabricated structure from the designed parameters.

Guided mode resonant filters (GMRFs) for authentication application with low sideband reflection at and azimuthal angles were designed. Using rigorous coupled-wave analysis, the diffractive characteristics of this kind device with different illumination angles, groove depths, and thicknesses of cover SiO2 layer were investigated. The structure of GMRF which satisfies the requirements for authentication applications was obtained. Illuminated at 30\circ for a definite polarization mode, the filter presents symmetrical reflectance shape, low sideband reflectance, two separate reflectance peaks, and definite full-width at half-maximum (FWHM) at 0\circ and 90\circ azimuthal angles.