Coherent XUV sources, which may operate at MHz repetition rate, could find applications in
high-precision spectroscopy and for spatio-time-resolved measurements of collective …

We demonstrate a high-finesse femtosecond enhancement cavity with an on-axis obstacle.
By inserting a wire with a width of 5% of the fundamental mode diameter, the finesse of F …

We present a low-loss VIS/IR-XUV beam splitter, suitable for high-power operation. The
spatial separation of the VIS/IR and XUV components of a beam is achieved by the wedged …

Enhancement cavities are passive optical resonators in which continuous-wave laser
radiation or pulses of a frequency comb are coherently overlapped, allowing for a power and …

Within a few-cycle laser, the generation of MHz isolated extreme ultraviolet (XUV)
attosecond pulses via nanoplasmonic field enhancement in silver nanostructures is …

Ultrafast lasers have revolutionized research in fundamental physics, chemistry and biology
as well as industrial applications. A great number of experiments benefit from the …

The fundamental principles of Gaussian beam transformation discussed in the preceding
section can be used to analyse fundamental properties of laser resonators, such as the …

Experimental and theoretical progress on subpicosecond laser pulse breakdown in
dielectric films is reviewed. The single pulse threshold fluences can be related to …

Time-and Angle-resolved photoemission spectroscopy (tr-ARPES) from surfaces can be
used to record the dynamics of electrons and holes in condensed matter and chemical …

We theoretically investigate utilizing the enhanced plasmonic fields in metallic
nanostructures. Numerical techniques are employed to optimize nanoantennas to attain the …