title: Decomposition of powerful axisymmetrically polarized laser pulses in underdense plasma.
abstract: Interaction of relativistically intense axisymmetrically polarized (radially or azimuthally polarized) laser pulses (RIAPLP) with underdense plasma is shown experimentally and theoretically to be essentially different from the interaction of conventional Gaussian pulses. The difference is clearly observed in distinct spectra of the side-scattered laser light for the RIAPLP and Gaussian pulses, as well as in the appearance of a spatially localized strong side emission of second harmonic of the laser pulse in the case of RIAPLP. According to our analysis based on three-dimensional particle-in-cell simulations, this is a result of instability in the propagation of RIAPLP in uniform underdense plasma.
authors.affiliation: Photon Pioneers Center, Osaka University.|Core Research of Evolutional Science and Technology (CREST), Japan Science and Technology Agency.|Kansai Photon Science Institute, National Institutes for Quantum and Radiological Science and Technology.
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Nakanii
authors.affiliation: Photon Pioneers Center, Osaka University.|Core Research of Evolutional Science and Technology (CREST), Japan Science and Technology Agency.|Graduate School of Engineering, Osaka University.
authors.forename: Tomonao
authors.initials: T
authors.lastname: Hosokai
authors.affiliation: Photon Pioneers Center, Osaka University.
authors.forename: Naveen C
authors.initials: NC
authors.lastname: Pathak
authors.affiliation: Photon Pioneers Center, Osaka University.|Core Research of Evolutional Science and Technology (CREST), Japan Science and Technology Agency.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Masuda
authors.affiliation: Photon Pioneers Center, Osaka University.|Core Research of Evolutional Science and Technology (CREST), Japan Science and Technology Agency.
authors.forename: Alexei G
authors.initials: AG
authors.lastname: Zhidkov
authors.affiliation: Graduate School of Engineering, Osaka University.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Nakahara
authors.affiliation: Graduate School of Engineering, Osaka University.
authors.forename: Kenta
authors.initials: K
authors.lastname: Iwasa
authors.affiliation: Graduate School of Engineering, Osaka University.
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Mizuta
authors.affiliation: Graduate School of Engineering, Osaka University.
authors.forename: Naoki
authors.initials: N
authors.lastname: Takeguchi
authors.affiliation: Photon Pioneers Center, Osaka University.
authors.forename: Takamitsu P
authors.initials: TP
authors.lastname: Otsuka
authors.affiliation: Photon Pioneers Center, Osaka University.
authors.forename: Keiichi
authors.initials: K
authors.lastname: Sueda
authors.affiliation: Photon Pioneers Center, Osaka University.
authors.forename: Jumpei
authors.initials: J
authors.lastname: Ogino
authors.affiliation: Graduate School of Engineering, Osaka University.
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Nakamura
authors.affiliation: Kansai Photon Science Institute, National Institutes for Quantum and Radiological Science and Technology.
authors.forename: Michiaki
authors.initials: M
authors.lastname: Mori
authors.affiliation: Kansai Photon Science Institute, National Institutes for Quantum and Radiological Science and Technology.
authors.forename: Masaki
authors.initials: M
authors.lastname: Kando
authors.affiliation: Photon Pioneers Center, Osaka University.|Graduate School of Engineering, Osaka University.|Institute of Laser Engineering, Osaka University.
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Kodama