What is it about?
Ultrafast nonlinear photoemission electron microscopy is used to characterize how plasmonic file distributions depend on various parameters of femtosecond light pulses in resonance with Ag nanocrystals.
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Why is it important?
Because it constrains the spatial distribution of optical excitations that one can excite in plasmonic particles. This is usually not characterized with nanometer resolution, and wild claims are made based on a lack of knowledge.
Perspectives
To claim that plasmons induce chemistry or transduct energy, one needs to know the spatial and temporal distribution of plasmonic fields. This is rarely performed, but remarkable properties of plasmonic responses are claimed without supporting evidence.
Hrvoje Petek
University of Pittsburgh, Department of Physics and Astronomy
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This page is a summary of: Optical field tuning of localized plasmon modes in Ag microcrystals at the nanofemto scale, The Journal of Chemical Physics, February 2020, American Institute of Physics,
DOI: 10.1063/1.5139543.
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