Surface plasmon polaritons on the thin metallic film coated with symmetrical and asymmetrical dielectric gratings

被引：8

作者：

Meng, Yan ^{[1
,2
]}

Zhang, Ruo-Yang ^{[2
]}

Zhang, Qiang ^{[3
]}

Liu, Zhenzhen ^{[3
]}

Wu, Xiaoxiao ^{[2
]}

Xiao, Junjun ^{[3
]}

Xiang, Hong ^{[1
]}

Han, Dezhuan ^{[1
]}

Wen, Weijia ^{[1
,2
]}

机构：

[1] Chongqing Univ, Dept Appl Phys, Chongqing 401331, Peoples R China

[2] Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China

[3] Shenzhen Grad Sch, Harbin Inst Technol, Coll Elect & Informat Engn, Shenzhen 518055, Peoples R China

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2017年 / 50卷 / 48期

基金：

中国国家自然科学基金;

关键词：

surface plasmon polariton; dielectric grating; coupled mode theory; COUPLED-MODE THEORY; OPTICAL-TRANSMISSION;

D O I：

10.1088/1361-6463/aa9300

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Surface plasmon polartions (SPPs) on the planar metallic film coated with dielectric gratings on both sides are studied theoretically and numerically. It is found that the coupling between SPP modes can be efficiently tuned by the relative shift of the gratings on the two sides, including both the symmetrical and asymmetrical cases. The absorption due to the excitation of SPPs can be enhanced or suppressed as the coupling of SPP modes varies. A coupled mode theory is employed to analyze the coupling between these SPP modes in addition to full-wave simulations. The results obtained by the coupled mode theory and numerical simulations agree well with each other. The investigation of coupled SPP modes may have potential applications in photonic devices.

引用

页数：7

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