title: Controlling multiple filaments by relativistic optical vortex beams in plasmas.
abstract: Filamentation dynamics of relativistic optical vortex beams (OVBs) propagating in underdense plasma is investigated. It is shown that OVBs with finite orbital angular momentum (OAM) exhibit much more robust propagation behavior than the standard Gaussian beam. In fact, the growth rate of the azimuthal modulational instability decreases rapidly with increase of the OVB topological charge. Thus, relativistic OVBs can maintain their profiles for significantly longer distances in an underdense plasma before filamentation occurs. It is also found that an OVB would then break up into regular filament patterns due to conservation of the OAM, in contrast to a Gaussian laser beam, which in general experiences random filamentation.
authors.affiliation: Graduate School, China Academy of Engineering Physics, Beijing 100088, People's Republic of China.|Institute of Applied Physics and Computational Mathematics, Beijing 100094, People's Republic of China.
authors.forename: L B
authors.initials: LB
authors.lastname: Ju
authors.affiliation: HEDPS, Center for Applied Physics and Technology and School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: T W
authors.initials: TW
authors.lastname: Huang
authors.affiliation: HEDPS, Center for Applied Physics and Technology and School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: K D
authors.initials: KD
authors.lastname: Xiao
authors.affiliation: Graduate School, China Academy of Engineering Physics, Beijing 100088, People's Republic of China.
authors.forename: G Z
authors.initials: GZ
authors.lastname: Wu
authors.affiliation: HEDPS, Center for Applied Physics and Technology and School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: S L
authors.initials: SL
authors.lastname: Yang
authors.affiliation: HEDPS, Center for Applied Physics and Technology and School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: R
authors.initials: R
authors.lastname: Li
authors.affiliation: HEDPS, Center for Applied Physics and Technology and School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: Y C
authors.initials: YC
authors.lastname: Yang
authors.affiliation: HEDPS, Center for Applied Physics and Technology and School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: T Y
authors.initials: TY
authors.lastname: Long
authors.affiliation: Institute of Applied Physics and Computational Mathematics, Beijing 100094, People's Republic of China.
authors.forename: H
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Institute of Applied Physics and Computational Mathematics, Beijing 100094, People's Republic of China.
authors.forename: S Z
authors.initials: SZ
authors.lastname: Wu
authors.affiliation: HEDPS, Center for Applied Physics and Technology and School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: B
authors.initials: B
authors.lastname: Qiao
authors.affiliation: College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, People's Republic of China.
authors.forename: S C
authors.initials: SC
authors.lastname: Ruan
authors.affiliation: Institute of Applied Physics and Computational Mathematics, Beijing 100094, People's Republic of China.|HEDPS, Center for Applied Physics and Technology and School of Physics, Peking University, Beijing 100871, People's Republic of China.|College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, People's Republic of China.
authors.forename: C T
authors.initials: CT
authors.lastname: Zhou