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

Abstract

Simultaneous spatio-temporal confinement of energetic electron pulses to femtosecond and nanometer scales is a topic of great interest in the scientific community, given the potential im- pact of such development on 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 understanding the role of boundaries and defects on macroscopic properties. On the other hand, advances in this field are mostly limited by the electron source brightness and size. 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 illus- trate how the pulse duration and strength can be tuned by geometric design, and predict sub-10 fs pulses with nanoscale diameter can be achieved. We then fabricated lenses in gold films and char- acterized their plasmonic properties with cathodoluminescence spectromicroscopy, demonstrating suitable plasmonic behavior for ultrafast, nanoscale photoemission.

Authors:

Durham, Daniel B.  ^[1];

• Search DOE PAGES for author "Durham, Daniel B."
• Search DOE PAGES for ORCID "0000-0002-5780-6852"

Riminucci, Fabrizio  ^[2];

• Search DOE PAGES for author "Riminucci, Fabrizio"
• Search DOE PAGES for ORCID "0000-0001-7865-4256"

Ciabattini, Filippo  ^[3];

• Search DOE PAGES for author "Ciabattini, Filippo"
• Search DOE PAGES for ORCID "0000-0002-2063-3580"

Mostacci, Andrea  ^[4];

• Search DOE PAGES for author "Mostacci, Andrea"
• Search DOE PAGES for ORCID "0000-0002-4407-7312"

Minor, Andrew M.  ^[1];

• Search DOE PAGES for author "Minor, Andrew M."
• Search DOE PAGES for ORCID "0000-0003-3606-8309"

Cabrini, Stefano ^[3]; Filippetto, Daniele  ^[3]

• Search DOE PAGES for author "Filippetto, Daniele"
• Search DOE PAGES for ORCID "0000-0001-5831-860X"

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+ Show Author Affiliations

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:

Mon Nov 25 00:00:00 EST 2019

Research Org.:

Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of California, Berkeley, CA (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES)

Contributing Org.:

University of Rome "La Sapienza"

OSTI Identifier:

1597722

Alternate Identifier(s):

OSTI ID: 1575348

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; 43 PARTICLE ACCELERATORS; Accelerators & beams; Condensed matter & material physics; Particles & fields; Nanoemitters; plasmonics; Ultrafast