Controlling the generation of THz radiation from metallic films using periodic microstructure

被引：9
|
作者：
Polyushkin, D. K. [1 ,2 ]
Hendry, E. [1 ]
Barnes, W. L. [1 ]
机构：
[1] Univ Exeter, Sch Phys & Astron, Exeter EX4 4QL, Devon, England
[2] Vienna Univ Technol, Inst Photon, A-1040 Vienna, Austria
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2015年 / 120卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
TERAHERTZ RADIATION; OPTICAL RECTIFICATION; GOLD-FILMS; SURFACES; PULSES; LASER;
D O I：
10.1007/s00340-015-6096-y
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report on THz frequency generation via irradiation of microstructured semicontinuous silver films by femtosecond laser pulses. By patterning the film so as to produce an array of microstrips, we show that one can use periodic microstructure to control the way nanostructured metal films produce THz radiation when illuminated by femtosecond infrared laser pulses. A simple analytical model based on the field distribution arising from an array of THz dipole emitters is used to assess the experimental data, allowing us to explain some of the main features of the generated THz radiation patterns, including the strongly resonant features of the emission spectrum.
引用
收藏
页码：53 / 59
页数：7
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