title: Spatio-temporal X-wave.
abstract: We introduce an illumination configuration which is a spatiotemporal analog of a non-diffracting X-wave. By interfering multiple ultrashort converging plane waves, we generate a tight central spot at which a transform limited ultrashort pulse is formed. Outside this tight focus a spatiotemporal speckle field with longer duration and reduced peak power is created. We investigate this spatiotemporal X-wave configuration analytically, numerically, and experimentally demonstrate the effect using two photon excitation fluorescence.
authors.affiliation: Department of physics of Complex System, The Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: Eran
authors.initials: E
authors.lastname: Small
authors.forename: Ori
authors.initials: O
authors.lastname: Katz
authors.forename: Yochay
authors.initials: Y
authors.lastname: Eshel
authors.forename: Yaron
authors.initials: Y
authors.lastname: Silberberg
authors.forename: Dan
authors.initials: D
authors.lastname: Oron