Environmental symmetry breaking promotes plasmon mode splitting in gold nanotriangles

Kyle W. Smith; Jian Yang; Taylor Hernandez; Dayne F. Swearer; Leonardo Scarabelli; Hui Zhang; Hangqi Zhao; Nicholas A. Moringo; Wei Shun Chang; Luis M. Liz-Marzán; Emilie Ringe; Peter Nordlander; Stephan Link

doi:10.1021/acs.jpcc.7b08428

Environmental symmetry breaking promotes plasmon mode splitting in gold nanotriangles

Kyle W. Smith, Jian Yang, Taylor Hernandez, Dayne F. Swearer, Leonardo Scarabelli, Hui Zhang, Hangqi Zhao, Nicholas A. Moringo, Wei Shun Chang, Luis M. Liz-Marzán, Emilie Ringe^*, Peter Nordlander, Stephan Link

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

We report a single particle investigation of the polarized scattering spectra of individual Au nanotriangles (NTs) of the truncated bifrustrum type. We unexpectedly observed a wide diversity in the scattering spectra from a population of NTs with low shape polydispersity. Correlation of the optical measurements with electron microscopy revealed that the different optical responses were not due to distinct NT shapes. Rather, finite element simulations revealed that distinct polarized spectra originated from minute changes in the inclination of the NTs on the substrate. NT inclination resulted in asymmetric image charge formation in the substrate, thus, breaking the degeneracy of the modes supported by the NTs. The degeneracy of the NT modes was extremely sensitive to such symmetry breaking, with inclination angles as small as 2°, producing clearly resolved, nondegenerate, and orthogonally polarized plasmon modes.

Original language	English (US)
Journal	Journal of Physical Chemistry C
Volume	121
Issue number	39
DOIs	https://doi.org/10.1021/acs.jpcc.7b08428
State	Published - 2017

Funding

This work was funded by the Robert A. Welch Foundation (C-1664 to S.L., C-1222 to P.N), the Army Research Office (MURI W911NF-12-1-0407 to S.L. and P.N.), the National Science Foundation (CHE1507745 to S.L.), and the European Research Council (ERC Advanced Grant 267867 Plasmaquo to L.L.-M.). K.W.S., T.H., and D.F.S. acknowledge that this material is based upon work supported by the National Science Foundation Graduate Research Fellowship Program (1450681).

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/acs.jpcc.7b08428

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title = "Environmental symmetry breaking promotes plasmon mode splitting in gold nanotriangles",

abstract = "We report a single particle investigation of the polarized scattering spectra of individual Au nanotriangles (NTs) of the truncated bifrustrum type. We unexpectedly observed a wide diversity in the scattering spectra from a population of NTs with low shape polydispersity. Correlation of the optical measurements with electron microscopy revealed that the different optical responses were not due to distinct NT shapes. Rather, finite element simulations revealed that distinct polarized spectra originated from minute changes in the inclination of the NTs on the substrate. NT inclination resulted in asymmetric image charge formation in the substrate, thus, breaking the degeneracy of the modes supported by the NTs. The degeneracy of the NT modes was extremely sensitive to such symmetry breaking, with inclination angles as small as 2°, producing clearly resolved, nondegenerate, and orthogonally polarized plasmon modes.",

author = "Smith, {Kyle W.} and Jian Yang and Taylor Hernandez and Swearer, {Dayne F.} and Leonardo Scarabelli and Hui Zhang and Hangqi Zhao and Moringo, {Nicholas A.} and Chang, {Wei Shun} and Liz-Marz{\'a}n, {Luis M.} and Emilie Ringe and Peter Nordlander and Stephan Link",

note = "Funding Information: This work was funded by the Robert A. Welch Foundation (C-1664 to S.L., C-1222 to P.N), the Army Research Office (MURI W911NF-12-1-0407 to S.L. and P.N.), the National Science Foundation (CHE1507745 to S.L.), and the European Research Council (ERC Advanced Grant 267867 Plasmaquo to L.L.-M.). K.W.S., T.H., and D.F.S. acknowledge that this material is based upon work supported by the National Science Foundation Graduate Research Fellowship Program (1450681). Publisher Copyright: {\textcopyright} XXXX American Chemical Society.",

year = "2017",

doi = "10.1021/acs.jpcc.7b08428",

language = "English (US)",

volume = "121",

journal = "Journal of Physical Chemistry C",

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AU - Smith, Kyle W.

AU - Yang, Jian

AU - Hernandez, Taylor

AU - Swearer, Dayne F.

AU - Scarabelli, Leonardo

AU - Zhang, Hui

AU - Zhao, Hangqi

AU - Moringo, Nicholas A.

AU - Chang, Wei Shun

AU - Liz-Marzán, Luis M.

AU - Ringe, Emilie

AU - Nordlander, Peter

AU - Link, Stephan

N1 - Funding Information: This work was funded by the Robert A. Welch Foundation (C-1664 to S.L., C-1222 to P.N), the Army Research Office (MURI W911NF-12-1-0407 to S.L. and P.N.), the National Science Foundation (CHE1507745 to S.L.), and the European Research Council (ERC Advanced Grant 267867 Plasmaquo to L.L.-M.). K.W.S., T.H., and D.F.S. acknowledge that this material is based upon work supported by the National Science Foundation Graduate Research Fellowship Program (1450681). Publisher Copyright: © XXXX American Chemical Society.

PY - 2017

Y1 - 2017

N2 - We report a single particle investigation of the polarized scattering spectra of individual Au nanotriangles (NTs) of the truncated bifrustrum type. We unexpectedly observed a wide diversity in the scattering spectra from a population of NTs with low shape polydispersity. Correlation of the optical measurements with electron microscopy revealed that the different optical responses were not due to distinct NT shapes. Rather, finite element simulations revealed that distinct polarized spectra originated from minute changes in the inclination of the NTs on the substrate. NT inclination resulted in asymmetric image charge formation in the substrate, thus, breaking the degeneracy of the modes supported by the NTs. The degeneracy of the NT modes was extremely sensitive to such symmetry breaking, with inclination angles as small as 2°, producing clearly resolved, nondegenerate, and orthogonally polarized plasmon modes.

AB - We report a single particle investigation of the polarized scattering spectra of individual Au nanotriangles (NTs) of the truncated bifrustrum type. We unexpectedly observed a wide diversity in the scattering spectra from a population of NTs with low shape polydispersity. Correlation of the optical measurements with electron microscopy revealed that the different optical responses were not due to distinct NT shapes. Rather, finite element simulations revealed that distinct polarized spectra originated from minute changes in the inclination of the NTs on the substrate. NT inclination resulted in asymmetric image charge formation in the substrate, thus, breaking the degeneracy of the modes supported by the NTs. The degeneracy of the NT modes was extremely sensitive to such symmetry breaking, with inclination angles as small as 2°, producing clearly resolved, nondegenerate, and orthogonally polarized plasmon modes.

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ER -

Environmental symmetry breaking promotes plasmon mode splitting in gold nanotriangles

Abstract

Funding

ASJC Scopus subject areas

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