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Two-color photoionization in xuv free-electron and visible laser fields

Meyer, M., Cubaynes, D., O’Keeffe, P., Luna, H., Yeates, Patrick orcid logoORCID: 0000-0002-6734-0590, Kennedy, Eugene T. orcid logoORCID: 0000-0002-0710-5281, Costello, John T. orcid logoORCID: 0000-0003-4677-9999, Orr, P., Taïeb, R., Maquet, A., Düsterer, S., Radcliffe, P., Redlin, H., Azima, A., Plönjes, E. and Feldhaus, J. (2006) Two-color photoionization in xuv free-electron and visible laser fields. Physical Review A, 74 (1). 011401-1. ISSN 1050-2947

Abstract
Two-photon ionization of atomic helium has been measured by combining femtosecond extreme-ultraviolet pulses from the free-electron laser in Hamburg (FLASH at DESY) with intense light pulses from a synchronized neodymium-doped yttrium lithium fluoride laser. Sidebands appear in the photoelectron spectra when the two laser pulses overlap in both space and time. Their intensity exhibits a characteristic dependence on the relative time delay between the ionizing and the dressing pulses and provides an inherent time marker for time-resolved pump-probe experiments. The measurements of the sidebands are in good agreement with theoretical predictions and allow for a direct analysis of two-photon ionization, free from processes related to interference between multiple quantum paths.
Metadata
Item Type:Article (Published)
Refereed:Yes
Subjects:Physical Sciences > Physics
DCU Faculties and Centres:Research Institutes and Centres > National Centre for Plasma Science and Technology (NCPST)
DCU Faculties and Schools > Faculty of Science and Health > School of Physical Sciences
Publisher:The American Physical Society
Official URL:http://dx.doi.org/10.1103/PhysRevA.74.011401
Copyright Information:© 2006 The American Physical Society
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Enterprise Ireland, Higher Education Authority, Science Foundation Ireland
ID Code:15604
Deposited On:05 Aug 2010 13:44 by DORAS Administrator . Last Modified 07 Oct 2021 12:44
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