Azzam R M A, Sudradjat F F
Department of Electrical Engineering, University of New Orleans, New Orleans, Louisiana 70148, USA.
Appl Opt. 2008 Mar 10;47(8):1103-8. doi: 10.1364/ao.47.001103.
The complex-amplitude reflection coefficients of p- and s-polarized light by a transparent freestanding, embedded, or deposited quarter-wave layer (QWL) are derived as explicit functions of the angle of incidence and layer refractive index. This provides the basis for the design of 50%-50% beam splitters for incident s-polarized or unpolarized light that use a high-index (e.g., TiO2 or Ge) QWL embedded in a glass cube in the visible and near infrared spectral range. These simple devices have good angular and spectral response and are insensitive to small film thickness errors to the first order.
通过透明的独立、嵌入或沉积的四分之一波长层（QWL）对p偏振光和s偏振光的复振幅反射系数被推导为入射角和层折射率的显式函数。这为设计用于入射s偏振或非偏振光的50%-50%分束器提供了基础，该分束器在可见光和近红外光谱范围内使用嵌入玻璃立方体中的高折射率（例如TiO2或Ge）QWL。这些简单的器件具有良好的角度和光谱响应，并且对一阶小薄膜厚度误差不敏感。
