Geometrical optics in the near field: local plane-interface approach with evanescent waves

被引:2
|
作者
Bose, Gaurav [1 ]
Hyvarinen, Heikki J. [2 ]
Tervo, Jani [1 ]
Turunen, Jari [1 ]
机构
[1] Univ Eastern Finland, Inst Photon, FI-80101 Joensuu, Finland
[2] Nanocomp Oy Ltd, FI-80710 Lehmo, Finland
来源
OPTICS EXPRESS | 2015年 / 23卷 / 01期
基金
芬兰科学院;
关键词
BLAZED TRANSMISSION GRATINGS; APPROXIMATION; DIFFRACTION; ELEMENTS; DESIGN;
D O I
10.1364/OE.23.000330
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We show that geometrical models may provide useful information on light propagation in wavelength-scale structures even if evanescent fields are present. We apply a so-called local plane-wave and local plane-interface methods to study a geometry that resembles a scanning near-field microscope. We show that fair agreement between the geometrical approach and rigorous electromagnetic theory can be achieved in the case where evanescent waves are required to predict any transmission through the structure. (C) 2015 Optical Society of America
引用
收藏
页码:330 / 339
页数:10
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