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.

News

© 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!

© 2019 EPFL

Best oral presentation during the SCS fall meeting by Oliviero

— Best oral presentation during the SCS fall meeting by Oliviero

© 2019 EPFL

ERC Starting Grant 2019

— Giulia Mancini has won an ERC Starting Grant 2019

© 2019 EPFL

Former EPFL PhD student wins IBM Prize of the SPS

— Congratulations to our former PhD student Edoardo Baldini for winning the IBM Prize of the Swiss Physical Society.

© 2019 EPFL

Vidi grant from NWO

— Congratulations to Giulia Mancini for winning the VIDI grant at the Zernike Institute for Advanced Materials (RUG, NE)