Few-femtosecond deep and vacuum ultraviolet laser pulses

by Prof. John Travers (Heriot Watt University)

Tuesday 16 Apr 2024, 16:00 → 17:00 Europe/Berlin

Virtually all materials and chemical compounds exhibit strong electronic absorption resonances in the vacuum and deep ultraviolet (100-300 nm). To address important photophysical dynamics at their natural timescales, wavelength-tuneable pulses across this spectral region with few-femtosecond duration are required. However, combining such short wavelengths with very short pulse duration and sufficient pulse energy for experiments is a significant challenge, and conventional frequency conversion techniques have not been able to fulfil these requirements. Resonant dispersive wave emission in gas-filled hollow-core waveguides is a promising route to address this need, delivering continuously tuneable microjoule-level pulses across the vacuum and deep ultraviolet with sub-3-fs pulse duration. In this talk I will describe this technique, the latest advances we have made, and several recent applications of these sources.

 

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