Tunable high-order frequency mixing for XUV transient absorption and photoelectron spectroscopies

Nathan Harkema, Alexander Plunkett, Arvinder Sandhu

Research output: Contribution to journalArticle

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.

Original languageEnglish (US)
Pages (from-to)31053-31061
Number of pages9
JournalOptics Express
Volume27
Issue number21
DOIs
StatePublished - Oct 14 2019

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absorption spectroscopy
photoelectron spectroscopy
harmonics
color
helium
ultraviolet emission
oxygen
pulses
four-wave mixing
quantum numbers
excitation
switches
photons
wavelengths
energy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Tunable high-order frequency mixing for XUV transient absorption and photoelectron spectroscopies. / Harkema, Nathan; Plunkett, Alexander; Sandhu, Arvinder.

In: Optics Express, Vol. 27, No. 21, 14.10.2019, p. 31053-31061.

Research output: Contribution to journalArticle

Harkema, Nathan ; Plunkett, Alexander ; Sandhu, Arvinder. / Tunable high-order frequency mixing for XUV transient absorption and photoelectron spectroscopies. In: Optics Express. 2019 ; Vol. 27, No. 21. pp. 31053-31061.
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