Haïdar Riad, Vincent Grégory, Guérineau Nicolas, Collin Stéphane, Velghe Sabrina, Primot Jérôme
Opt Express. 2005 Dec 12;13(25):9941-53. doi: 10.1364/opex.13.009941.
A Wollaston prism-like binary dielectric grating is presented and analyzed. It behaves like a transmission grating, differentially and symmetrically blazed for the two crossed polarization states, TE and TM. The phase profile is obtained by means of subwavelength structures etched in a high optical index isotropic dielectric medium (gallium arsenide, for instance). The performance of the device is illustrated by numerical examples and sketched in terms of spectral bandwidth and of extinction ratio. Some practical issues related to the fabrication are discussed.
提出并分析了一种类似渥拉斯顿棱镜的二元介质光栅。它的行为类似于透射光栅，对TE和TM这两种交叉偏振态进行差分且对称闪耀。相位分布是通过在高光折射率各向同性介质（例如砷化镓）中蚀刻的亚波长结构获得的。通过数值示例说明了该器件的性能，并从光谱带宽和消光比方面进行了描述。讨论了与制造相关的一些实际问题。
