Plasmonic Damage to nano-patterned gold-on-silicon
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Download or edit the free picture Plasmonic Damage to nano-patterned gold-on-silicon for GIMP online editor. It is an image that is valid for other graphic or photo editors in OffiDocs such as Inkscape online and OpenOffice Draw online or LibreOffice online by OffiDocs.
As part of our work on developing a useful photoemitter for Ultrafast Electron Microscopy, we attempted to fabricate and use a nano-patterned gold-on-silicon structure. It was periodic such that it promoted plasmonic excitation in the gold-vacuum interface. It was hoped that this plasmonic state would then photo-emit electrons with a reduced transverse momentum.While this may have briefly occurred the heat that was generated was far more than the material could handle. The image shows how the gold was completely removed under the (elongated) laser spot and melted the underlayer of silicon into waves. The plasmon then propagated (righwards) through the gold pattern, imprinting damage as it went. Once it left the pattern, the wave was able to self-interfere as it continued to the right until finally it attenuated to a non-destructive level.
The image is false-color by count histogram which should approximately be black for silicon and yellow for gold.
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