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Coherent control of plasmonic systems and nonlinear generation in WSe2


we have succeeded in combining our few-cycle sources with our near-field scattering microscope allowing the observation of the broad frequency response as well as the ultrafast transient dynamics of plasmonic systems and in van-der-Waals materials.


Specifically, we demonstrate and report the first ultrafast and deep-subwavelength visualization of exciton-polariton formation and propagation in multilayer WSe2 at room temperature. Our experimental approach opens the way for extreme Spatio-temporal imaging and control of linear and nonlinear light-matter interaction at the nanoscale.

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