Design of reconfigurable metallic slits for terahertz beam modulation

被引：44
|
作者：
Berry, Christopher W. [1 ]
Moore, Jeremy [1 ]
Jarrahi, Mona [1 ]
机构：
[1] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA
来源：
OPTICS EXPRESS | 2011年 / 19卷 / 02期
基金：
美国国家科学基金会;
关键词：
PHASE MODULATOR; LOW-VOLTAGE; TRANSMISSION; SWITCHES; FILTER;
D O I：
10.1364/OE.19.001236
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We analyze the interaction of electromagnetic waves with double-layered subwavelength metallic slits on a dielectric substrate. This structure allows efficient transmission of an incident TM-polarized electromagnetic wave into the dielectric substrate, due to the presence of surface modes which couple the incident wave to the TEM waveguide modes supported by the subwavelength metallic slits. Our study shows that electromagnetic transmission through double-layered subwavelength metallic slits is strongly geometry dependent. Based on this observation, a terahertz modulation scheme is presented which, compared to existing terahertz modulator solutions, has the promise of significant enhancement in modulation index over a broad range of terahertz frequencies. (C) 2011 Optical Society of America
引用
收藏
页码：1236 / 1245
页数：10
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