@article{42ddd0f572e343e8959aaf9ca504165b,
title = "Surface plasmon assisted electron acceleration in photoemission from gold nanopillars",
abstract = "Electron photoemission from lithographically prepared gold nanopillars using few-cycle, 800 nm 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 the work function taking into account the shortest wavelength within the laser bandwidth. A classical electron acceleration model consisting of nonlinear ionization followed by field acceleration qualitatively reproduces the electron kinetic energy data and suggests average enhanced electric fields due to the nanopillars that are between 25 and 39 times greater than the experimentally used laser fields. Implications for plasmon-enhanced attosecond streaking are discussed.",
keywords = "Electron acceleration, Few-cycle pulses, Photoelectron emission, Plasmon field enhancement",
author = "Nagel, {Phillip M.} and Robinson, {Joseph S.} and Harteneck, {Bruce D.} and Thomas Pfeifer and Abel, {Mark J.} and Prell, {James S.} and Neumark, {Daniel M.} and Kaindl, {Robert A.} and Leone, {Stephen R.}",
note = "Funding Information: Time-of-flight studies were supported by the NSF Division of Chemistry under Award #CHE-0742662 [PMN, SRL] and by the Materials Sciences and Engineering Division of the U.S. Department of Energys Office of Basic Energy Sciences (DOE-BES) under Contract No. DE-AC02–05CH11231 [JSR, RAK]. Simulations were supported by the DOE-BES Chemical Sciences, Geosciences, and Biosciences Division , while nanopillar synthesis was performed under a user proposal at the Molecular Foundry, both under the above DOE contract. Few-cycle instrumentation development was supported by the AFOSR-MURI program under Award #FA95500410242 . SRL gratefully acknowledges the support of a Department of Defense National Security Science and Engineering Faculty Fellowship (NSSEFF). TP and MJA also acknowledge a Max-Planck Research Group grant and a Alexander von Humboldt Foundation fellowship, respectively.",
year = "2013",
month = mar,
day = "12",
doi = "10.1016/j.chemphys.2012.03.013",
language = "English (US)",
volume = "414",
pages = "106--111",
journal = "Chemical Physics",
issn = "0301-0104",
publisher = "Elsevier",
}