Laser-assisted photoemission from surfaces

G. Saathoff, L. Miaja-Avila, M. Aeschlimann, M. M. Murnane, and H. C. Kapteyn
Phys. Rev. A 77, 022903 – Published 29 February 2008

Abstract

We investigate the laser-assisted photoelectric effect from a solid surface. By illuminating a Pt(111) sample simultaneously with ultrashort 1.6 and 42eV pulses, we observe sidebands in the extreme ultraviolet photoemission spectrum, and accurately extract their amplitudes over a wide range of laser intensities. Our results agree with a simple model, in which soft x-ray photoemission is accompanied by the interaction of the photoemitted electron with the laser field. This strong effect can definitively be distinguished from other laser surface interaction phenomena, such as hot electron excitation, above-threshold photoemission, and space-charge acceleration. Thus, laser-assisted photoemission from surfaces promises to extend pulse duration measurements to higher photon energies, as well as opening up measurements of femtosecond-to-attosecond electron dynamics in solid and surface-adsorbate systems.

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  • Received 23 November 2007

DOI:https://doi.org/10.1103/PhysRevA.77.022903

©2008 American Physical Society

Authors & Affiliations

G. Saathoff1,*, L. Miaja-Avila1, M. Aeschlimann2, M. M. Murnane1, and H. C. Kapteyn1

  • 1Department of Physics and JILA, University of Colorado, Boulder, Colorado 80309-0440, USA
  • 2Department of Physics, University of Kaiserslautern, Kaiserslautern D-67663, Germany

  • *Present address: Max-Planck-Institut für Quantenoptik, Garching, Germany. Guido.Saathoff@mpq.mpg.de. FAX: (303) 492-5235.

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Vol. 77, Iss. 2 — February 2008

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