Centre d’Élaboration de Matériaux et d’Etudes Structurales (UPR 8011)

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Ultrafast dynamics in nanoscale systems

Ultrafast Transmission Electron Microscopy

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The FemTOTEM project aims at developing an Ultrafast Transmission Electron Microscope (UTEM) based on a high brightness laser-driven field emission electron source. This will be achieved by bringing together a femtosecond laser source and a customized cold-field emission Transmission Electron Microscope (CFEG-TEM). This combination of femtosecond time resolution, high brightness (allowing high spatial resolution and coherence of electrons) and energy resolution will have a unique potential for frontier research in nanophysics and materials science.

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Femtosecond Pump-Probe Spectroscopy of Individual Nano-Objects

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We have developed in CEMES an experimental set-up capable of resolving the acoustic vibrations of individual nano-objects and investigate their mechanical coupling with the environment.

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Plasmon-resonant spectroscopies in noble metal nanostructures: vibrationnal and electronic continua

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In noble metal nanostructures, interactions between light, electronic and vibrational excitations are widely modified comparing with what occurs in bulk materials. Their sizes are significantly smaller than the light wavelength, skin depth, electron mean free path, acoustic wavelength…. Resulting confinement and damping effects on either collective or individual, either atomic or electronic vibrations, have been analyzed through plasmon-resonant Raman scattering under specific experimental conditions on a panel of composite multilayer samples.

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