Narrowband high harmonic pulses for trARPES using frequency-upconverted Ti:Sapphire lasersUrbančič, Jurij (Avtor)
HHGARPESLasertrARPES using femtosecond XUV 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 shorter wavelength 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 while preserving excellent time resolution.02020-05-22 11:39:35Delo ni kategorizirano5462COBISS_ID: 16570627NUK URN: URN:SI:UNG:REP:QFLW3R53sl