Effect of multipole excitations in electron energy-loss spectroscopy of surface plasmon modes in silver nanowires
Abstract
We have characterized the surface plasmon resonance (SPR) in silver nanowires using spatially resolved electron energy loss spectroscopy (EELS) in the scanning transmission electron microscope. Non-symmetric EELS spectra due to high-k SPR propagation along the nanowire and spectral shifts due to higher-order mode excitation are observed when the beam is positioned near the tip of the nanowire. When the beam is far from the tip region and on the side of nanowire, no spectral shifts are observed as the beam is scanned in the radial direction of the nanowire. The experimental spectra are compared with three different theoretical approaches: direct numerical calculation of the energy loss, analytical models for energy loss, and numerical simulations using an optical model. All three models reproduce the spectral shifts as the electron beam approaches the cap of the nanowire. The analytical model reveals the origin of the shifts in high-order plasmon mode excitation.
- Authors:
-
[1];
- Univ. of Michigan, Ann Arbor, MI (United States). Center for Ultrafast Optical Science
- Karl-Franzens-Univ. Graz, Graz (Austria). Inst. für Physk
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Material Measurement Lab.
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Center for Solar and Thermal Energy Conversion (CSTEC)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1370076
- Alternate Identifier(s):
- OSTI ID: 1226597
- Grant/Contract Number:
- SC0000957
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 116; Journal Issue: 22; Related Information: CSTEC partners with University of Michigan (lead); Kent State University; Journal ID: ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 77 NANOSCIENCE AND NANOTECHNOLOGY
Citation Formats
Zhou, Xiuli, Hörl, Anton, Trügler, Andreas, Hohenester, Ulrich, Norris, Theodore B., and Herzing, Andrew A. Effect of multipole excitations in electron energy-loss spectroscopy of surface plasmon modes in silver nanowires. United States: N. p., 2014.
Web. doi:10.1063/1.4903535.
Zhou, Xiuli, Hörl, Anton, Trügler, Andreas, Hohenester, Ulrich, Norris, Theodore B., & Herzing, Andrew A. Effect of multipole excitations in electron energy-loss spectroscopy of surface plasmon modes in silver nanowires. United States. https://doi.org/10.1063/1.4903535
Zhou, Xiuli, Hörl, Anton, Trügler, Andreas, Hohenester, Ulrich, Norris, Theodore B., and Herzing, Andrew A. Mon .
"Effect of multipole excitations in electron energy-loss spectroscopy of surface plasmon modes in silver nanowires". United States. https://doi.org/10.1063/1.4903535. https://www.osti.gov/servlets/purl/1370076.
@article{osti_1370076,
title = {Effect of multipole excitations in electron energy-loss spectroscopy of surface plasmon modes in silver nanowires},
author = {Zhou, Xiuli and Hörl, Anton and Trügler, Andreas and Hohenester, Ulrich and Norris, Theodore B. and Herzing, Andrew A.},
abstractNote = {We have characterized the surface plasmon resonance (SPR) in silver nanowires using spatially resolved electron energy loss spectroscopy (EELS) in the scanning transmission electron microscope. Non-symmetric EELS spectra due to high-k SPR propagation along the nanowire and spectral shifts due to higher-order mode excitation are observed when the beam is positioned near the tip of the nanowire. When the beam is far from the tip region and on the side of nanowire, no spectral shifts are observed as the beam is scanned in the radial direction of the nanowire. The experimental spectra are compared with three different theoretical approaches: direct numerical calculation of the energy loss, analytical models for energy loss, and numerical simulations using an optical model. All three models reproduce the spectral shifts as the electron beam approaches the cap of the nanowire. The analytical model reveals the origin of the shifts in high-order plasmon mode excitation.},
doi = {10.1063/1.4903535},
journal = {Journal of Applied Physics},
number = 22,
volume = 116,
place = {United States},
year = {Mon Dec 08 00:00:00 EST 2014},
month = {Mon Dec 08 00:00:00 EST 2014}
}
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