Enhanced absorption and optical force in a sandwiched grating at the terahertz band

被引：4
|
作者：
Zhang, Yong [1 ]
Han, Mei [1 ]
Huang, Cheng-Ping [1 ]
机构：
[1] Nanjing Univ Technol, Coll Sci, Dept Appl Phys, Nanjing 210009, Peoples R China
来源：
EPL | 2013年 / 102卷 / 03期
基金：
中国国家自然科学基金;
关键词：
METAMATERIALS; ABSORBER; INDEX; TIME;
D O I：
10.1209/0295-5075/102/34001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A type of terahertz absorber is proposed, which has open-ended slit cavities within a simple sandwiched plasmonic grating. Due to a special kind of subwavelength Fabry-Perot-like resonance, the structure shows high, multi-band, and wide-angle absorption over the terahertz frequency range. Moreover, the structure also presents strong positive or negative electromagnetic force, which can be tuned by adjusting the system parameters. The effect may be employed to drive the mechanic motions of terahertz devices. Copyright (C) EPLA, 2013
引用
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页数：5
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