Electron photoemission from lithographically prepared gold nanopillars using few-cycle, 800nm laser pulses is measured. Electron kinetic energies are observed that are higher by up to tens of eV compared to photoemission from a flat gold surface at the same laser intensities. In addition, ionization from the nanopillar sample scales like a two-photon process, while three photons are needed to overcome...
We report plasmon-assisted photoemission from gold nanopillars using few cycle near-IR laser pulses, along with simulations, showing strong acceleration and a scaling of the electron yield that indicates the transition into the strong-field regime.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.