TY - JOUR
AU - Steffen Eich
AU - A. Stange
AU - A.V. Carr
AU - J. Urbancic
AU - Tenio Popmintchev
AU - M. Wiesenmayer
AU - K. Jansen
AU - A. Ruffing
AU - S. Jakobs
AU - T. Rohwer
AU - S. Hellmann
AU - C. Chen
AU - Piotr Matyba
AU - L. Kipp
AU - Kai Rossnagel
AU - M. Bauer
AU - Margaret Murnane
AU - Henry Kapteyn
AU - Stefan Mathias
AU - Martin Aeschlimann
AB - <p>Time- and angle-resolved photoemission spectroscopy (trARPES) using femtosecond extreme ultraviolet high harmonics has recently emerged as a powerful tool for investigating ultrafast quasiparticle dynamics in correlated-electron materials. However, the full potential of this approach has not yet been achieved because, to date, high harmonics generated by 800nm wavelength Ti:Sapphire lasers required a trade-off between photon flux, energy and time resolution. Photoemission spectroscopy requires a quasi-monochromatic output, but dispersive optical elements that select a single harmonic can significantly reduce the photon flux and time resolution. Here we show that 400nm driven high harmonic extreme-ultraviolet trARPES is superior to using 800nm laser drivers since it eliminates the need for any spectral selection, thereby increasing photon flux and energy resolution to &lt;150meV while preserving excellent time resolution of about 30fs.</p>

BT - Journal of Electron Spectroscopy and Related Phenomena
DA - 2020-08
DO - 10.1016/j.elspec.2014.04.013
N2 - <p>Time- and angle-resolved photoemission spectroscopy (trARPES) using femtosecond extreme ultraviolet high harmonics has recently emerged as a powerful tool for investigating ultrafast quasiparticle dynamics in correlated-electron materials. However, the full potential of this approach has not yet been achieved because, to date, high harmonics generated by 800nm wavelength Ti:Sapphire lasers required a trade-off between photon flux, energy and time resolution. Photoemission spectroscopy requires a quasi-monochromatic output, but dispersive optical elements that select a single harmonic can significantly reduce the photon flux and time resolution. Here we show that 400nm driven high harmonic extreme-ultraviolet trARPES is superior to using 800nm laser drivers since it eliminates the need for any spectral selection, thereby increasing photon flux and energy resolution to &lt;150meV while preserving excellent time resolution of about 30fs.</p>

PY - 2020
SE - 231-236
SP - 231
EP - 236
T2 - Journal of Electron Spectroscopy and Related Phenomena
TI - Time- and angle-resolved photoemission spectroscopy with optimized high-harmonic pulses using frequency-doubled Ti:Sapphire lasers
UR - http://www.sciencedirect.com/science/article/pii/S036820481400108X
VL - 195
SN - 0368-2048
ER -