title: Tomographic reconstruction of circularly polarized high-harmonic fields: 3D attosecond metrology.
abstract: Bright, circularly polarized, extreme ultraviolet (EUV) and soft x-ray high-harmonic beams can now be produced using counter-rotating circularly polarized driving laser fields. Although the resulting circularly polarized harmonics consist of relatively simple pairs of peaks in the spectral domain, in the time domain, the field is predicted to emerge as a complex series of rotating linearly polarized bursts, varying rapidly in amplitude, frequency, and polarization. We extend attosecond metrology techniques to circularly polarized light by simultaneously irradiating a copper surface with circularly polarized high-harmonic and linearly polarized infrared laser fields. The resulting temporal modulation of the photoelectron spectra carries essential phase information about the EUV field. Utilizing the polarization selectivity of the solid surface and by rotating the circularly polarized EUV field in space, we fully retrieve the amplitude and phase of the circularly polarized harmonics, allowing us to reconstruct one of the most complex coherent light fields produced to date.
authors.affiliation: Department of Physics and JILA, University of Colorado, Boulder, Boulder, CO 80309-0440, USA.
authors.forename: Cong
authors.initials: C
authors.lastname: Chen
authors.affiliation: Department of Physics and JILA, University of Colorado, Boulder, Boulder, CO 80309-0440, USA.
authors.forename: Zhensheng
authors.identifier: 0000-0003-1438-6074
authors.initials: Z
authors.lastname: Tao
authors.affiliation: Department of Physics and JILA, University of Colorado, Boulder, Boulder, CO 80309-0440, USA.; Grupo de Investigación en Aplicaciones del Láser y Fotónica, University of Salamanca, E-37008 Salamanca, Spain.
authors.forename: Carlos
authors.initials: C
authors.lastname: Hernández-García
authors.affiliation: Department of Physics and JILA, University of Colorado, Boulder, Boulder, CO 80309-0440, USA.
authors.forename: Piotr
authors.initials: P
authors.lastname: Matyba
authors.affiliation: Department of Physics and JILA, University of Colorado, Boulder, Boulder, CO 80309-0440, USA.
authors.forename: Adra
authors.identifier: 0000-0003-2773-0516
authors.initials: A
authors.lastname: Carr
authors.affiliation: Department of Physics and JILA, University of Colorado, Boulder, Boulder, CO 80309-0440, USA.
authors.forename: Ronny
authors.initials: R
authors.lastname: Knut
authors.affiliation: Solid State Institute and Physics Department, Technion, Haifa 32000, Israel.
authors.forename: Ofer
authors.identifier: 0000-0003-1253-9372
authors.initials: O
authors.lastname: Kfir
authors.affiliation: Department of Physics and JILA, University of Colorado, Boulder, Boulder, CO 80309-0440, USA.
authors.forename: Dimitry
authors.initials: D
authors.lastname: Zusin
authors.affiliation: Department of Physics and JILA, University of Colorado, Boulder, Boulder, CO 80309-0440, USA.
authors.forename: Christian
authors.identifier: 0000-0002-7657-6220
authors.initials: C
authors.lastname: Gentry
authors.affiliation: Department of Physics and JILA, University of Colorado, Boulder, Boulder, CO 80309-0440, USA.
authors.forename: Patrik
authors.identifier: 0000-0002-7042-9334
authors.initials: P
authors.lastname: Grychtol
authors.affiliation: Solid State Institute and Physics Department, Technion, Haifa 32000, Israel.
authors.forename: Oren
authors.initials: O
authors.lastname: Cohen
authors.affiliation: Grupo de Investigación en Aplicaciones del Láser y Fotónica, University of Salamanca, E-37008 Salamanca, Spain.
authors.forename: Luis
authors.initials: L
authors.lastname: Plaja
authors.affiliation: Department of Physics and JILA, University of Colorado, Boulder, Boulder, CO 80309-0440, USA.
authors.forename: Andreas
authors.initials: A
authors.lastname: Becker
authors.affiliation: Department of Physics and JILA, University of Colorado, Boulder, Boulder, CO 80309-0440, USA.
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Jaron-Becker
authors.affiliation: Department of Physics and JILA, University of Colorado, Boulder, Boulder, CO 80309-0440, USA.
authors.forename: Henry
authors.identifier: 0000-0001-8386-6317
authors.initials: H
authors.lastname: Kapteyn
authors.affiliation: Department of Physics and JILA, University of Colorado, Boulder, Boulder, CO 80309-0440, USA.
authors.forename: Margaret
authors.initials: M
authors.lastname: Murnane
keywords: High-harmonic generation, frequency conversion; attosecond metrology; circular harmonic generation.; time-resolved photoemission