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Title: Plasmonic Lenses for Tunable Ultrafast Electron Emitters at the Nanoscale

Abstract

Simultaneous spatiotemporal confinement of energetic electron pulses to femtosecond and nanometer scales is a topic of great interest in the scientific community, given the potential impact of such developments across a wide spectrum of scientific and industrial applications. For example, in ultrafast electron scattering, nanoscale probes would enable accurate maps of structural dynamics in materials with nanoscale heterogeneity, thereby leading to an understanding of the role of boundaries and defects on macroscopic properties. On the other hand, advances in this field are mostly limited by the brightness and size of the electron source. We present the design, fabrication, and optical characterization of bullseye plasmonic lenses for next-generation ultrafast electron sources. Using electromagnetic simulations, we examine how the interplay between light-plasmon coupling, plasmon propagation, dispersion, and resonance governs the properties of the photoemitted electron pulse. We also illustrate how the pulse duration and strength can be tuned by geometric design and predict that sub-10-fs pulses with nanoscale diameter can be achieved. Finally, we then fabricate lenses in gold films and characterize their plasmonic properties using cathodoluminescence spectromicroscopy, demonstrating suitable plasmonic behavior for ultrafast nanoscale photoemission.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [1];  [3]; ORCiD logo [3]
  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of Rome (Italy); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Univ. of Rome (Italy)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1597722
Grant/Contract Number:  
[AC02-05CH11231]
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Applied
Additional Journal Information:
[ Journal Volume: 12; Journal Issue: 5]; Journal ID: ISSN 2331-7019
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; accelerators & beams; condensed matter & material physics; particles & fields

Citation Formats

Durham, Daniel B., Riminucci, Fabrizio, Ciabattini, Filippo, Mostacci, Andrea, Minor, Andrew M., Cabrini, Stefano, and Filippetto, Daniele. Plasmonic Lenses for Tunable Ultrafast Electron Emitters at the Nanoscale. United States: N. p., 2019. Web. doi:10.1103/physrevapplied.12.054057.
Durham, Daniel B., Riminucci, Fabrizio, Ciabattini, Filippo, Mostacci, Andrea, Minor, Andrew M., Cabrini, Stefano, & Filippetto, Daniele. Plasmonic Lenses for Tunable Ultrafast Electron Emitters at the Nanoscale. United States. doi:10.1103/physrevapplied.12.054057.
Durham, Daniel B., Riminucci, Fabrizio, Ciabattini, Filippo, Mostacci, Andrea, Minor, Andrew M., Cabrini, Stefano, and Filippetto, Daniele. Mon . "Plasmonic Lenses for Tunable Ultrafast Electron Emitters at the Nanoscale". United States. doi:10.1103/physrevapplied.12.054057.
@article{osti_1597722,
title = {Plasmonic Lenses for Tunable Ultrafast Electron Emitters at the Nanoscale},
author = {Durham, Daniel B. and Riminucci, Fabrizio and Ciabattini, Filippo and Mostacci, Andrea and Minor, Andrew M. and Cabrini, Stefano and Filippetto, Daniele},
abstractNote = {Simultaneous spatiotemporal confinement of energetic electron pulses to femtosecond and nanometer scales is a topic of great interest in the scientific community, given the potential impact of such developments across a wide spectrum of scientific and industrial applications. For example, in ultrafast electron scattering, nanoscale probes would enable accurate maps of structural dynamics in materials with nanoscale heterogeneity, thereby leading to an understanding of the role of boundaries and defects on macroscopic properties. On the other hand, advances in this field are mostly limited by the brightness and size of the electron source. We present the design, fabrication, and optical characterization of bullseye plasmonic lenses for next-generation ultrafast electron sources. Using electromagnetic simulations, we examine how the interplay between light-plasmon coupling, plasmon propagation, dispersion, and resonance governs the properties of the photoemitted electron pulse. We also illustrate how the pulse duration and strength can be tuned by geometric design and predict that sub-10-fs pulses with nanoscale diameter can be achieved. Finally, we then fabricate lenses in gold films and characterize their plasmonic properties using cathodoluminescence spectromicroscopy, demonstrating suitable plasmonic behavior for ultrafast nanoscale photoemission.},
doi = {10.1103/physrevapplied.12.054057},
journal = {Physical Review Applied},
number = [5],
volume = [12],
place = {United States},
year = {2019},
month = {11}
}

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