Terahertz surface plasmon excitation via nonlinear mixing of lasers in a metal-coated optical fiber

被引:5
|
作者
Kumar, Pawan [1 ]
Tripathi, V. K. [1 ]
机构
[1] Indian Inst Technol, Dept Phys, New Delhi 110016, India
关键词
D O I
10.1364/OL.38.003475
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Terahertz (THz) surface plasmon generation via nonlinear mixing of laser eigenmodes in an optical fiber coated with ultrathin metal foil and possessing a dielectric constant ripple of wave number q is investigated. The fiber supports THz surface plasma wave (SPW) with plasmon resonance in the THz domain and is controllable by film thickness. The lasers exert a difference frequency ponderomotive force on the electrons of the metal film. The ponderomotive force induces a nonlinear current driving the difference frequency THz SPW. THz amplitude to laser amplitude ratio of the order similar to 10(-2) can be achieved by CO2 laser in megawatt range. (C) 2013 Optical Society of America
引用
收藏
页码:3475 / 3477
页数:3
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