Max-Planck-Institut für Quantenoptik
Munich-Centre for Advanced Photonics, GERMANY
Over the past two decades, extreme-ultraviolet (XUV) pulses obtained via
laser-driven high-harmonic generation (HHG) have emerged as a key
experimental tool for the study and control of time-resolved electron
motion in atoms, molecules and solids. The prospects offered by numerous
potential applications in science and technology motivate significant
effort in further increasing the repetition rate, the photon energy and
the photon flux of HHG sources.
Among the approaches of driving HHG at multi-MHz repetition rates,
coherently stacking pulses of a mode-locked laser in a passive
enhancement cavity housing the HHG process seems to be most promising.
Here, recycling the pulse after each pass through the nonlinear medium
affords the necessary peak intensities for efficiently converting the
available visible/infrared fundamental radiation to the XUV. The
viability of this technique was recently confirmed by achieving record
average powers for table-top coherent sources at photon energies up to 30
After reviewing the basics of cavity-enhanced HHG, this presentation will
concentrate on recent measures developed in our group aiming at and
allowing for extending this record to higher XUV photon energies.
Seminar, April 30, 2013, 12:00. Seminar Room
Hosted by Prof. Jens Biegert