Refractive transmission of light and beam shaping with metallic nano-optic lenses

被引:235
作者
Sun, ZJ
Kim, HK
机构
[1] Univ Pittsburgh, Dept Elect Engn, Pittsburgh, PA 15261 USA
[2] Univ Pittsburgh, Inst Nanosci & Engn, Pittsburgh, PA 15261 USA
关键词
D O I
10.1063/1.1776327
中图分类号
O59 [应用物理学];
学科分类号
摘要
We have performed finite-difference time-domain (FDTD) analysis of optical transmission through a nanoslit array structure formed on a metal layer with tapered film thickness. The analysis result shows refractive transmission of light through the nanoslit array, opening up the possibility of creating metallic lenses that resemble glass lenses in their shape. Metallic lenses with curved surfaces are designed such that each nanoslit element transmits light with phase retardation controlled by the metal thickness in the aperture region. The FDTD analysis result demonstrates a focusing or collimating function of convex-shaped metal lenses. (C) 2004 American Institute of Physics.
引用
收藏
页码:642 / 644
页数:3
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