Ultra-narrow linewidth, nonpolarizing guide-mode resonance (GMR) filters with single and double common resonance wavelengths are designed. The guide-mode resonance filters consist of a single grating layer with asymmetric profiles. By choosing appropriate parameters, same resonance wavelengths for both transverse electric (TE) and transverse magnetic (TM) polarizations can be achieved. Results show that high reflection (more than 99.9%) is obtained at every resonance wavelength, and the full-wid

提出一种基于一维线衍射光栅的焦斑重构和远场测量新方法，从理论上分析了新方法在拓展测量仪器动态范围、提取远场焦斑高频旁瓣信息的有效性及方法的适用条件。基于实验室现有的一套远场测量系统平台及自行设计的一维线衍射光栅，以远场环围能量(PIB)曲线作为检验新方法有效性的指标，通过数值仿真和实验相结合考察了新方法的有效性，并从准确测量远场焦斑质量的角度探讨了不同减阈值的去噪方式对焦斑重构结果的影响，对结果进行了分析讨论。

正弦光栅、矩孔、圆孔的菲涅尔衍射与夫琅禾费衍射实验验证 matlab代码