Subwavelength device based on surface plasmon polariton

被引：0
|
作者：
Wang B.-Q. [1 ]
Zheng Z.-R. [1 ]
Gu P.-F. [1 ]
Shen W.-D. [1 ]
Rao W.-P. [1 ]
机构：
[1] State Key Laboratory of Modern Optical Instrumentation, Zhejiang University
来源：
Zhejiang Daxue Xuebao(Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2010年 / 44卷 / 02期
关键词：
Grating; Metallic thin film structure; Sub-wavelength metallic slit; Surface plasmon polariton;
D O I：
10.3785/j.issn.1008-973X.2010.02.028
中图分类号：
学科分类号：
摘要：
The selection criterion for device material was presented based on the coupled wave propagation depth and propagation distance of different metal material surface. Silver has the best characteristics. The propagation characteristic of light wave in sub-wavelength slit surrounded by periodic grating corrugations for the p-polarized Gaussian beam of wavelength 1050 nm, as an example, was simulated through the finite difference time domain method. Transmission enhancement and self-collimation phenomena in such device were achieved. The grating in incidence surface contributed to the transmission enhancement, and the grating in exit surface affected on far-field distribution of intensity. The number and the depth of the dented grooves in the grating had optimum parameters. The relation between transmission intensity and sub-wavelength slit depth had periodicity characteristic.
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页码：364 / 367+385
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