Longitudinal terahertz wave generation from an air plasma filament induced by a femtosecond laser

被引：55
|
作者：
Minami, Yasuo [1 ]
Kurihara, Takayuki [2 ]
Yamaguchi, Keita [2 ]
Nakajima, Makoto [3 ]
Suemoto, Tohru [2 ]
机构：
[1] Yokohama Natl Univ, Grad Sch Engn, Dept Phys, Yokohama, Kanagawa 2408501, Japan
[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
[3] Chiba Univ, Grad Sch Sci, Chiba 2638522, Japan
来源：
APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 15期
关键词：
PULSES;
D O I：
10.1063/1.4802482
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have generated and detected a longitudinally polarized (Z-polarized) terahertz (THz) wave by focusing a conically propagating THz beam generated from a plasma filament induced by a femtosecond laser pulse. In the experiment, we observed a radially polarized field in a collimated region and Z-polarized field at focus in the time domain. The maximum value of the Z-polarized THz electric field reached 1.0 kV/cm. It was also quantitatively discussed about the Z-polarized field and the radial field at the focal point. We expect this technique to find application in THz time domain spectroscopy. (C) 2013 AIP Publishing LLC [http://dx.doi.org/10.1063/1.4802482]
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页数：3
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