Tunable high-order frequency mixing for XUV transient absorption and photoelectron spectroscopies
Affiliation
Univ Arizona, Coll Opt SciUniv Arizona, Dept Phys
Issue Date
2019-10-11
Metadata
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OPTICAL SOC AMERCitation
Harkema, N., Plunkett, A., & Sandhu, A. (2019). Tunable high-order frequency mixing for XUV transient absorption and photoelectron spectroscopies. Optics Express, 27(21), 31053-31061.Journal
OPTICS EXPRESSRights
Copyright © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
We generate tunable extreme ultraviolet emission through high-order frequency mixing between a strong near-infrared field and a weak shortwave-infrared pulse whose wavelength can be adjusted. In this two-color driving scheme, new harmonics appear in between the single-color harmonics at energies which are linear combinations of photons from the two pulses. We demonstrate the utility of tunable two-color harmonics by employing them for XUV transient absorption spectroscopy and time-resolved photoelectron spectroscopy. We show that the two-color harmonics can be used to address the dynamics associated with excited states in Helium and Oxygen which are inaccessible using single-color harmonics. Specifically, we show the ability to switch between excitation of 3p and 4p states in Helium, control of transitions to the light induced states, observe new four-wave-mixing emissions, and selectively address different principal and vibrational quantum numbers associated with Oxygen Rydberg states. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing AgreementNote
Open access journalISSN
1094-4087Version
Final published versionSponsors
Office of Science, Basic Energy Sciences, United States Department of Energy (DOE) [DE-SC0018251]ae974a485f413a2113503eed53cd6c53
10.1364/oe.27.031053