News

Ursula Keller wins “Swiss Nobel” Marcel Benoist Prize- for pioneering work in ultrafast lasers

Farewell: the NCCR MUST ended - on June 30, 2022

MUST2022 Conference- a great success!

New scientific highlights- by MUST PIs Wörner, Chergui, and Richardson

FELs of Europe prize for Jeremy Rouxel- “Development or innovative use of advanced instrumentation in the field of FELs”

Ruth Signorell wins Doron prizefor pioneering contributions to the field of fundamental aerosol science

New FAST-Fellow Uwe Thumm at ETH- lectures on Topics in Femto- and Attosecond Science

International Day of Women and Girls in Science- SSPh asked female scientists about their experiences

New scientific highlight- by MUST PIs Milne, Standfuss and Schertler

EU XFEL Young Scientist Award for Camila Bacellar,beamline scientist and group leader of the Alvra endstation at SwissFEL

Prizes for Giulia Mancini and Rebeca Gomez CastilloICO/IUPAP Young Scientist Prize in Optics & Ernst Haber 2021

Nobel Prize in Chemistry awarded to RESOLV Member Benjamin List- for the development of asymmetric organocatalysis

Hans Jakob Wörner invited to give the „New Horizons Solvay Lectures” - online, October 5, 12 and 19

Unusual keynote talk at an international scientific conference- Do photons show gender bias?

NCCR MUST at Scientifica 2021- Lightning, organic solar cells, and virtual molecules

2-Dimensional UV-Vis set-up with 10-50 kHz repetition rate

back »»

Location		Contact
EPFL SB ISIC LSU CH H1 524-2 1015 Lausanne		Gerald Auböck Tel +41216930346
Setup / Configuration		Literature
This set-up uses a cryo-amplifier (Wyvern, KMLabs) to generate 50 fs pulses at 800 nm and a repetition rate of 10-50 kHz. The amplifier pumps a TOPAS-White (Light Conversion) two-stage NOPA, to obtain 20 microJ pulses in the visible. Using Achromatic doubling we generate 100 nm bandwidth of UV probe continuum for 2D pump-probe spectroscopy. The UV probe (200 nm Vis) pulses are detected using dispersed single-shot detection at 20-50 kHz repetition rate with a double CMOS array detector (2*512 pixels). At the moment the probe light is partially compressed, resulting in a time resolution of < 100 fs. The laser was designed for low-noise output. By pumping the amplifier with 3 pump lasers in parallel the pulse to pulse energy fluctuations are < 0.1% (measured RMS noise from a set of 10000 consecutive shots). This enables us to obtain very good S/N in pump-probe experiments, making it possible to carry out 2-D experiments in which the pump wavelength is scanned.		Figure: 2D-UV transient absorption spectrum of Myoglobin Femtosecond pump/supercontinuum-probe setup with 20 kHz repetition rate, Gerald Auböck, Cristina Consani, Roberto Monni, Andrea Cannizzo, Frank van Mourik and M. Chergui Rev. Sci. Instrum. 83 (2012) 093105 Ultrabroadband femtosecond two-dimensional ultraviolet transient absorption, G. Auböck, C. Consani, F. van Mourik and M. Chergui, Optics Letters 37 (2012) 2337 Ultrafast tryptophan-to-haem electron transfer in Myoglobins: A Two-dimensional UV spectroscopy study, G. Auböck, C. Consani, F. van Mourik and M. Chergui, Science (in press) Laboratory of Ultrafast Spectroscopy LSU more »»
		back »»