title: Soliton synchrotron afterglow in a laser plasma.
abstract: Coherent synchrotron radiation can be emitted by relativistic electromagnetic subcycle solitons dwelling in a low-temperature collisionless plasma. Using three-dimensional particle-in-cell simulations we show that solitons, left in a wake of a relativistically intense short circularly polarized laser pulse in the plasma, emit spiral electromagnetic wave, as a result of charge density oscillations in the wall of the soliton cavity. This high-frequency afterglow persists for tens of Langmuir periods.
authors.affiliation: Advanced Photon Research Center, Kansai Research Establishment, JAERI, Kizu, Kyoto 619-0215, Japan.
authors.forename: Timur
authors.initials: T
authors.lastname: Esirkepov
authors.forename: Sergei V
authors.initials: SV
authors.lastname: Bulanov
authors.forename: Katsunobu
authors.initials: K
authors.lastname: Nishihara
authors.forename: Toshiki
authors.initials: T
authors.lastname: Tajima