Application of high harmonic radiation in surface science

The development of compact and commercially available table-top, ultra-short pulse laser systems with pulse energies of the order of a few mJ, pulse durations of less then 30 fs and repetition rates of several kHz enables routinely the generation of high harmonic radiation with photon energies up to 100 eV. Thereby many different applications in surface science become possible that benefit from the particular characteristics of this kind of light source. In future, especially time resolved measurements that take advantage of the ultra-short pulses in the femtosecond and attosecond regime will attract considerable attention. Also the access to the whole Brillouin zone will stimulate new, time-resolved experiments. In this paper we will discuss applications of high harmonics to study surface properties using microscopy and photoelectron spectroscopy, and highlight investigations of dynamic processes in the XUV and soft X-ray regime.

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