用有限时域差分法对亚波长衍射光学元件进行三维分析。
Three-dimensional analysis of subwavelength diffractive optical elements with the finite-difference time-domain method.
作者信息
Mirotznik M S, Prather D W, Mait J N, Beck W A, Shi S, Gao X
机构信息
Department of Electrical Engineering and Computer Science, The Catholic University of America, Washington, DC 20064, USA.
出版信息
Appl Opt. 2000 Jun 10;39(17):2871-80. doi: 10.1364/ao.39.002871.
We present a three-dimensional (3D) analysis of subwavelength diffractive optical elements (DOE's), using the finite-difference time-domain (FDTD) method. To this end we develop and apply efficient 3D FDTD methods that exploit DOE properties, such as symmetry. An axisymmetric method is validated experimentally and is used to validate the more general 3D method. Analyses of subwavelength gratings and lenses, both with and without rotational symmetry, are presented in addition to a 2 x 2 subwavelength focusing array generator.
我们使用时域有限差分（FDTD）方法对亚波长衍射光学元件（DOE）进行了三维（3D）分析。为此，我们开发并应用了利用DOE特性（如对称性）的高效3D FDTD方法。一种轴对称方法经过实验验证，并用于验证更通用的3D方法。除了一个2×2亚波长聚焦阵列发生器外，还给出了对具有和不具有旋转对称性的亚波长光栅和透镜的分析。
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