Laboratory of Ultrafast Spectroscopy LSU

Ultrafast spectroscopy with femtosecond laser and fs/ps X-ray pulses – Condensed-phase dynamics – Dynamics of Biomolecules – Photovoltaic Materials

Welcome to Laboratory of Ultrafast Spectroscopy LSU

The activities of our laboratory aim at a detailed description of photo-induced processes in the molecular condensed phase (liquid, solid and proteins) and in metallic and semiconductor nanostructured materials. A central approach of our group is the visualization in “real time” of the processes by means of ultrafast laser spectroscopy.
The physical phenomena we investigate include: structural changes in the chromophores and the medium (be it a solvent or a protein) and the influence of local electric fields on their spectral and dynamical features. We also study the ultrafast dynamics of charge carriers in semiconductor and metallic nanostructures of different shapes and sizes.
The experimental tools we use are ultrafast picosecond and femtosecond transient absorption spectroscopy, ultrafast fluorescence up-conversion spectroscopy, photon-echo spectroscopy. We have also developed novel optical laser pump-X-ray probe techniques using femtosecond and femtosecond hard X-ray pulses from a synchrotron.


Majed Chergui. Credit: EPFL

Majed Chergui elected Fellow of the European Academy of Sciences

— EPFL Professor and founding director of the Lausanne Centre for Ultrafast Science (LACUS), Majed Chergui, has been elected Fellow of the European Academy of Sciences.

Professors Mazzanti, Chergui, Aye, and Queen. Credit: EPFL

ACS awards and honors for EPFL scientists

— Four scientists from EPFL’s Institute of Chemical Sciences and Engineering have won awards and honors from the American Chemical Society.

Anatomy of the Eye, authored by al-Mutadibih © the Cairo National Library

Optics and Arabic science EPN2020

— Arabic science of light: The birth of modern optics and of the experimental method

© 2020 EPFL

2020 PHYS Division Young Investigator Awards

— Edoardo was awarded another prize, this time for the ACS, entirely based on his thesis work on TiO2.

© 2020 EPFL

New quasiparticle unveiled in room temperature semiconductors

— Physicists from Switzerland and Germany have unveiled fingerprints of the long-sought particle known as Mahan exciton in the room temperature optical response of the popular methylammonium lead halide perovskites.

© 2020 EPFL

International Workshop "Electrons, Photons and Plasmons-2020"

— Save the date : June 3-5 2020, Nyon, Switzerland 

iStock photos/MichalLudwiczak

A new look at thermally-induced chemical reactions

— Scientists at EPFL have been able to monitor the time-evolution of thermally-induced chemical reactions with element- and structural-sensitivity.

Illustration of the exciton of TiO2 interacting with a propagating coherent acoustic wave. Credit: Adriel Dominguez (Max Planck Institute, Hamburg)

Controlling the optical properties of solids with acoustic waves

— Physicists from Switzerland, Germany, and France have found that large-amplitude acoustic waves, launched by ultrashort laser pulses, can dynamically manipulate the optical response of semiconductors.

© 2019 EPFL

Award for pioneering work in ultrafast laser science

— Edoardo Baldini wins the 2019 APS Carl E. Anderson

© 2019 EPFL

Lars Mewes gets a SNF early mobility grant

— Congrats to Lars Mewes for receiving the SNF early mobility price with which he will join the mumos group at TU Munich. All the best for your future!