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News

MUST2022 Conference- succesfully concluded
New scientific highlights- by MUST PIs 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
NCCR MUST at Scientifica 2021- Lightning, organic solar cells, and virtual molecules
#NCCRWomen- NCCR MUST celebrates 50 years women’s right to vote in Switzerland
Kick-Off dynaMENT Mentoring for Women in Natural Sciences- with Ursula Keller as plenary speaker

Nonlinear XUV-optical transient grating spectroscopy at the Si L2,3–edge

May 6, 2019


Nonlinear XUV-optical transient grating spectroscopy at the Si L2,3-edge: Time-resolved transient grating spectroscopy facilitates detailed studies of electron dynamics and transport phenomena by means of a periodic excitation of matter with coherent ultrashort light pulses. We demonstrated the element specificity of XUV TG (X-TG) experiments by tuning the photon energy across the Si L2,3-edge of Si3N4. We observe a shortening of the signal decay when increasing the XUV photon energy above the absorption edge. The analysis of the wavelength dependent signal shows that the faster decay is driven by the increase in the charge carrier density. From the decay constants the interband Auger coefficient at elevated temperatures and high electron densities has been determined.
























(a) Scheme of the MINI-TIMER setup for performing FWM experiments. The incident XUV pulse (blue) is split (mirror M0) and combined (mirrors M1 and M2) at the sample position to be mixed with a temporally delayed optical pulse (red). The transmitted XTG signal is detected using a CCD detector. (b) X-TG signals as observed on the CCD detector and the corresponding time trace for 100 eV XUV excitation. The time delays dt for which the CCD images are shown are marked red in the time trace.


Reference: R. Bohinc, G. Pamfilidis, J. Rehault, P. Radi, C. Milne, J. Szlachetko, F. Bencivenga, F. Capotondi, R. Cucini, L. Foglia, C. Masciovecchio, R. Mincigrucci, E. Pedersoli, A. Simoncig, N. Mahne, A. Cannizzo, H.M. Frey, Z. Ollmann, T. Feurer, A.A. Maznev, K. Nelson, and G. Knopp “Nonlinear XUV-optical transient grating spectroscopy at the Si L2,3-edge”, Applied Physics Letters (https://doi.org/10.1063/1.508541)
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