Terahertz Imaging with Optical Resolution by Femtosecond Laser Filament in Air

被引：1
|
作者：
Zhao, Jiayu [1 ]
Guo, Lanjun [1 ]
Liu, Weiwei [1 ]
机构：
[1] Nankai Univ, Inst Modern Opt, Key Lab Opt Informat Sci & Technol, Minist Educ, Tianjin 300071, Peoples R China
来源：
ULTRAFAST PHENOMENA XIX | 2015年 / 162卷
关键词：
D O I：
10.1007/978-3-319-13242-6_150
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We introduce a sub-wavelength resolution THz imaging technique which uses the THz radiation generated by a femtosecond laser filament in air as the probe, based on the fact that the femtosecond laser filament forms a waveguide for the THz wave in air. The diameter of the THz beam, which propagates inside the filament, varies from 20 to 50 mu m, which is significantly smaller than the wavelength of the THz wave. Using this highly spatially confined THz beam as the probe, THz imaging with resolution as high as 20 mu m (similar to lambda/38 at 0.4 THz) is promising.
引用
收藏
页码：612 / 615
页数：4
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