Ultrawide-bandwidth slow-light system based on THz plasmonic graded metallic grating structures

被引：364

作者：

Gan, Qiaoqiang ^{[1
]}

Fu, Zhan ^{[1
]}

Ding, Yujie J. ^{[1
]}

Bartoli, Filbert J. ^{[1
]}

机构：

[1] Lehigh Univ, Dept Elect & Comp Engn, Ctr Opt Technol, Bethlehem, PA 18015 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.100.256803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We explore a novel mechanism for slowing down THz waves based on metallic grating structures with graded depths, whose dispersion curves and cutoff frequencies are different at different locations. Since the group velocity of spoof surface plasmons at the cutoff frequency is extremely low, THz waves are actually stopped at different positions for different frequencies. The separation between stopped waves can be tuned by changing the grade of the grating depths. This structure offers the advantage of reducing the speed of the light over an ultrawide spectral band, and the ability to operate at various temperatures, but demands a stringent requirement for the temperature stability.

引用

页数：4

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