Anomalous transmission of terahertz wave through one-dimensional lamellar metallic grating

被引：14
|
作者：
Li, Dong [1 ]
Shu, Shiwei [1 ]
Li, Fangfang [1 ]
Ma, Guohong [1 ]
Dai, Ye [1 ]
Ma, Hongliang [1 ]
机构：
[1] Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2011年 / 284卷 / 10-11期
基金：
中国国家自然科学基金;
关键词：
Terahertz field effect; Surface plasmon; Grating; EXTRAORDINARY OPTICAL-TRANSMISSION; SURFACE-PLASMONS; SUBWAVELENGTH; RESONANCES;
D O I：
10.1016/j.optcom.2011.01.015
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The anomalous transmission through one-dimensional lamellar metallic gratings was investigated in terahertz (THz) regime. The extraordinary optical transmission (KIT) is identified to originate from two possible ways: coupling of incident light with waveguide resonances and coupling of surface plasmon polaritons (SPPs) at the upper and lower interfaces of metal grating. The dual effects of SPPs have been clarified in this study: (i) the excitation of SPP modes at each individual interface results in the weakness of the THz wave transmission; and (ii) the coupling of SPP modes at two interfaces of metal grating is attributed to enhancement of THz wave transmission. The enhanced transmission is dominated by the coupling of incident light with transverse waveguide resonances. Numerical simulation based on finite-difference time-domain (FDTD) agrees well with experimental results. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：2415 / 2419
页数：5
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