Publications by authors named "Baptiste Groussin"
Article Synopsis
- The use of nanophotonic methods for controlling photon-electron interactions is gaining interest in the particle accelerator field, with silicon-based integrated dielectric laser acceleration (DLA) emerging as a promising option.
- The study demonstrates a method using deep ultraviolet (DUV) ultrafast laser excitation to create silicon nanostructures over large areas, achieving features smaller than the diffraction limit.
- The technique results in highly uniform, high aspect-ratio structures, with notable periodicity and intricate 2D features, making it a simple and cost-effective approach for efficient silicon nanostructure production.
Photocathodes are key elements in high-brightness electron sources and ubiquitous in the operation of large-scale accelerators, although their operation is often limited by their quantum efficiency and lifetime. Here, we propose to overcome these limitations by utilizing direct-laser nanostructuring techniques on copper substrates, improving their efficiency and robustness for next-generation electron photoinjectors. When the surface of a metal is nanoengineered with patterns and particles much smaller than the optical wavelength, it can lead to the excitation of localized surface plasmons that produce hot electrons, ultimately contributing to the overall charge produced.
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