Finite-difference time-domain analysis of the interaction of gaussian evanescent light with a single dielectric sphere or ordered dielectric spheres

被引：14

作者：

Shinya, A ^{[1
]}

Fukui, M ^{[1
]}

机构：

[1] Univ Tokushima, Fac Engn, Dept Opt Sci & Technol, Tokushima 7708506, Japan

来源：

OPTICAL REVIEW | 1999年 / 6卷 / 03期

关键词：

gaussian evanescent light; visible light; whispering gallery modes; single sphere; ordered spheres; ATR geometry;

D O I：

10.1007/s10043-999-0215-0

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The interaction of gaussian evanescent light with a single dielectric sphere or ordered dielectric spheres in an attenuated total reflection (ATR) geometry was analyzed by the finite-difference time-domain method. Various aspects of this interaction were investigated in terms of spatial visualizations of light intensity, reflectance vs. wavelength characteristics, the transient behavior of reflectances, and so forth. In the case of a single sphere, it was evident that the whispering gallery mode can be excited in ATR geometries, but such excitation cannot be easily confirmed only through the observation of wavelength-scanned ATR spectra. In the case of a closely packed two-dimensional array of dielectric spheres, it was found that an easy axis and also a difficult axis for light propagation exist.

引用

页码：215 / 223

页数：9

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