Open AccessTerahertz pulse radiation from argon clusters
Author(s) -
Takeshi Nagashima,
Heijiro Hirayama,
Kyoji Shibuya,
Masanori Hangyo,
Masaki Hashida,
Shigeki Tokita,
Shuji Shimizu
Publication year - 2009
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.008907
Subject(s) - terahertz radiation , laser , argon , femtosecond , optics , materials science , radiation , polarization (electrochemistry) , terahertz spectroscopy and technology , far infrared laser , physics , atomic physics , chemistry
The characteristics of THz pulse radiation from argon clusters irradiated with intense femtosecond laser pulses have been investigated. The average power of the THz pulses radiated from argon clusters is approximately 40 times greater than that from argon gas. The enhancement of the THz radiation originates from large laser absorption by the clusters. The polarization state and the angular distribution of the power of the THz pulses show no dependence on laser polarization, which suggests that the radiation originates from laser-induced charge separation along the laser propagation direction.