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Generation of fast photoelectrons in strong-field emission from metal nanoparticles

Journal Article · · Nanophotonics
 [1];  [2];  [3];  [4];  [1];  [5];  [6];  [1];  [1]
  1. Kansas State University, Manhattan, KS (United States)
  2. Kansas State University, Manhattan, KS (United States); Matériaux et Télécommunication, Varennes, QC (Canada); University of Connecticut, Storrs, CT (United States)
  3. Kansas State University, Manhattan, KS (United States); Goethe University Frankfurt (Germany)
  4. Kansas State University, Manhattan, KS (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
  5. University of Connecticut, Storrs, CT (United States)
  6. SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Stanford University, CA (United States)
We investigated the generation and control of fast photoelectrons (PEs) by exposing plasmonic nanoparticles (NPs) to short infrared (IR) laser pulses with peak intensities between 1012 and 3 × 1013 W/cm2. Our measured and numerically simulated PE momentum distributions demonstrate the extent to which PE yields and cutoff energies are controlled by the NP size, material, and laser peak intensity. For strong-field photoemission from spherical silver, gold, and platinum NPs with diameters between 10 and 100 nm our results confirm and surpass extremely high PEs cutoff energies, up to several hundred times the incident laser-pulse ponderomotive energy, found recently for gold nanospheres [Saydanzad et al., Nanophotonics 12, 1931 (2023)]. As reported previously for dielectric NPs [Rupp et al., J. Mod. Opt. 64, 995 (2017)], at higher intensities the cutoff energies we deduce from measured and simulated PE spectra tend to converge to a metal-independent limit. We expect these characteristics of light-induced electron emission from prototypical plasmonic metallic nanospheres to promote the understanding of the electronic dynamics in more complex plasmonic nanostructures and the design of nanoscale light-controlled plasmonic electron sources for photoelectronic devices of applied interest.
Research Organization:
Kansas State University, Manhattan, KS (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
AC02-76SF00515; FG02-86ER13491
OSTI ID:
3003073
Alternate ID(s):
OSTI ID: 2575030
Journal Information:
Nanophotonics, Journal Name: Nanophotonics Journal Issue: 9 Vol. 14; ISSN 2192-8614
Publisher:
Walter de Gruyter GmbHCopyright Statement
Country of Publication:
United States
Language:
English

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