Azzam R M A
Department of Electrical Engineering, University of New Orleans, Louisiana 70148, USA.
Appl Opt. 2006 Jul 1;45(19):4572-5. doi: 10.1364/ao.45.004572.
Prisms and slabs made of high-refractive-index materials such as ZnSe, Ge, and Si can be designed as broadband, 50%-50%, beam splitters (BSs) for obliquely incident s- polarized light in the near- and mid-IR. The beam-splitting face of the prism or slab is uncoated, while the exit face is antireflection coated. The split beams travel in orthogonal directions when light is incident at the Brewster angle. A novel design is also described that uses Brewster-angle reflection at the SiO2-Si interface to achieve a 50%-50%s-polarization BS over the 1.2-3.5 microm spectral range. Such s-polarization BSs are particularly suited for interferometry and holography.
由诸如硒化锌、锗和硅等高折射率材料制成的棱镜和平板，可以设计成用于近红外和中红外斜入射s偏振光的宽带、50%-50%分光器（BS）。棱镜或平板的分光面未镀膜，而出射面镀有抗反射膜。当光以布儒斯特角入射时，分离出的光束沿正交方向传播。还描述了一种新颖的设计，该设计利用二氧化硅-硅界面处的布儒斯特角反射，在1.2-3.5微米光谱范围内实现50%-50%的s偏振分光器。这种s偏振分光器特别适用于干涉测量和全息术。
