亚波长衍射微透镜色散的数值分析  

Numerical analysis of the dispersion of subwavelength diffractive microlens

作　　者：刘玉玲[1] 卢振武[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所

出　　处：《物理学报》2004年第6期1782-1787,共6页Acta Physica Sinica

基　　金：中国科学院长春光学精密机械与物理研究所创新项目 (批准号 :2 0 0 2LQ .0 4)资助的课题~~

摘　　要：采用旋转体时域有限差分法对亚波长衍射微透镜进行数值分析 ,给出了在微透镜焦平面上的电场强度分布和从近场到远场的电场强度分布 .研究了亚波长衍射微透镜的色散 ,给出了入射波长不同于设计波长的色散曲线 ,数值分析结果表明了亚波长衍射微透镜的负向色散特性 。Subwavelength diffractive microlenses are analyzed by use of body_of_ revolutionary finite_difference time_domain method. The electric field distributions on the focal plane of the element and the distributions from near field to far field are shown. The dispersion property of subwavelength diffractive microlens is investigated. The dispersion curve in the case of incident wavelength different from the design wavelength is shown. Numerical result illustrates the negative dispersion characteristic of the element, and the increase of focal length is faster than the decrease of incident wavelength.

关 键 词：亚波长衍射微透镜 色散 数值分析 时域有限差分法 

分 类 号：O436[机械工程—光学工程]