title: Direct spatiotemporal measurements of accelerating ultrashort Bessel-type light bullets.
abstract: We measure the spatiotemporal field of ultrashort pulses with complex spatiotemporal profiles using the linear-optical, interferometric pulse-measurement technique SEA TADPOLE. Accelerating and decelerating ultrashort, localized, nonspreading Bessel-X wavepackets were generated from a approximately 27 fs duration Ti:Sapphire oscillator pulse using a combination of an axicon and a convex or concave lens. The wavefields are measured with approximately 5 microm spatial and approximately 15 fs temporal resolutions. Our experimental results are in good agreement with theoretical calculations and numerical simulations.
authors.affiliation: Institute of Physics, University of Tartu, Riia 142, Tartu, 51014 Estonia. heli.lukner@ut.ee
authors.forename: Heli
authors.initials: H
authors.lastname: Valtna-Lukner
authors.forename: Pamela
authors.initials: P
authors.lastname: Bowlan
authors.forename: Madis
authors.initials: M
authors.lastname: Lõhmus
authors.forename: Peeter
authors.initials: P
authors.lastname: Piksarv
authors.forename: Rick
authors.initials: R
authors.lastname: Trebino
authors.forename: Peeter
authors.initials: P
authors.lastname: Saari