Near field excited state imaging via stimulated electron energy gain spectroscopy of localized surface plasmon resonances in plasmonic nanorod antennas.

Robyn Collette, David A Garfinkel, Zhongwei Hu, David J Masiello, Philip D Rack

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Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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1citing papers in PubMed

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3 · Its place in the literature

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1 citing paper in PubMed.

Direct Bottom-UpChemical reviews · 2023
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5 · Who and what money

Authors and funding

5 authors.

Robyn ColletteDepartment of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996, USA.

David A GarfinkelDepartment of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996, USA.

Zhongwei HuDepartment of Chemistry, University of Washington, Seattle, WA, 98195, USA.

David J MasielloDepartment of Chemistry, University of Washington, Seattle, WA, 98195, USA.

Philip D RackDepartment of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996, USA. prack@utk.edu.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Continuous wave (cw) photon stimulated electron energy loss and gain spectroscopy (sEELS and sEEGS) is used to image the near field of optically stimulated localized surface plasmon resonance (LSPR) modes in nanorod antennas. An optical delivery system equipped with a nanomanipulator and a fiber-coupled laser diode is used to simultaneously irradiate plasmonic nanostructures in a (scanning) transmission electron microscope. The nanorod length is varied such that the m = 1, 2, and 3 LSPR modes are resonant with the laser energy and the optically stimulated near field spectra and images of these modes are measured. Various nanorod orientations are also investigated to explore retardation effects. Optical and electron beam simulations are used to rationalize the observed patterns. As expected, the odd modes are optically bright and result in observed sEEG responses. The m = 2 dark mode does not produce a sEEG response, however, when tilted such that retardation effects are operative, the sEEG signal emerges. Thus, we demonstrate that cw sEEGS is an effective tool in imaging the near field of the full set of nanorod plasmon modes of either parity.

Identifiers

PMID32719406

DOI10.1038/s41598-020-69066-z

PMCPMC7385139

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