title: Terahertz pulse radiation from argon clusters.
abstract: 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.
authors.affiliation: Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan. nagasima@ile.osaka-u.ac.jp
authors.forename: Takeshi
authors.initials: T
authors.lastname: Nagashima
authors.forename: Heijiro
authors.initials: H
authors.lastname: Hirayama
authors.forename: Kyoji
authors.initials: K
authors.lastname: Shibuya
authors.forename: Masanori
authors.initials: M
authors.lastname: Hangyo
authors.forename: Masaki
authors.initials: M
authors.lastname: Hashida
authors.forename: Shigeki
authors.initials: S
authors.lastname: Tokita
authors.forename: Shuji
authors.initials: S
authors.lastname: Sakabe
mesh_terms: D001128:Argon / Q000737:chemistry* / Q000528:radiation effects*; D004735:Energy Transfer; D007834:Lasers; D008029:Lighting / Q000379:methods*; D011829:Radiation Dosage; D055053:Terahertz Radiation
chemical_list: D001128:Argon