20.500.12556/RUNG-3067-533b5e8b-6c0b-2f18-ac6b-270b20546339
Time- and angle-resolved photoemission spectroscopy with optimized high-harmonic pulses using frequency-doubled Ti:Sapphire lasers
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 800 nm 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 400 nm driven high harmonic extreme-ultraviolet trARPES is superior to using 800 nm laser drivers since it eliminates the need for any spectral selection, thereby increasing photon flux and energy resolution to <150 meV while preserving excellent time resolution of about 30 fs.
angle-resolved photoemission spectroscopy
ARPES
high harmonic generation
ultrafast surface science
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Angleški jezik
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2017-04-20 12:07:35
2017-04-20 17:35:44
2023-06-09 03:20:16
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2014
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6
2014
2014
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4770299
DOI: 10.1016/j.elspec.2014.04.013
URN:SI:UNG:REP:6ON4O0P9
Univerza v Novi Gorici
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