title: Microengineering Laser Plasma Interactions at Relativistic Intensities.
abstract: We report on the first successful proof-of-principle experiment to manipulate laser-matter interactions on microscales using highly ordered Si microwire arrays. The interaction of a high-contrast short-pulse laser with a flat target via periodic Si microwires yields a substantial enhancement in both the total and cutoff energies of the produced electron beam. The self-generated electric and magnetic fields behave as an electromagnetic lens that confines and guides electrons between the microwires as they acquire relativistic energies via direct laser acceleration.
authors.affiliation: Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
authors.forename: S
authors.initials: S
authors.lastname: Jiang
authors.affiliation: Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
authors.forename: L L
authors.initials: LL
authors.lastname: Ji
authors.affiliation: Division of Chemistry and Chemical Engineering, 127-72 Noyes Laboratory, California Institute of Technology, Pasadena, California 91125, USA.
authors.forename: H
authors.initials: H
authors.lastname: Audesirk
authors.affiliation: Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
authors.forename: K M
authors.initials: KM
authors.lastname: George
authors.affiliation: Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
authors.forename: J
authors.initials: J
authors.lastname: Snyder
authors.affiliation: Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
authors.forename: A
authors.initials: A
authors.lastname: Krygier
authors.affiliation: Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
authors.forename: P
authors.initials: P
authors.lastname: Poole
authors.affiliation: Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
authors.forename: C
authors.initials: C
authors.lastname: Willis
authors.affiliation: Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
authors.forename: R
authors.initials: R
authors.lastname: Daskalova
authors.affiliation: Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
authors.forename: E
authors.initials: E
authors.lastname: Chowdhury
authors.affiliation: Division of Chemistry and Chemical Engineering, 127-72 Noyes Laboratory, California Institute of Technology, Pasadena, California 91125, USA.
authors.forename: N S
authors.initials: NS
authors.lastname: Lewis
authors.affiliation: Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
authors.forename: D W
authors.initials: DW
authors.lastname: Schumacher
authors.affiliation: Heinrich-Heine University of Dusseldorf, 40225 Dusseldorf, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Pukhov
authors.affiliation: Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
authors.forename: R R
authors.initials: RR
authors.lastname: Freeman
authors.affiliation: Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
authors.forename: K U
authors.initials: KU
authors.lastname: Akli