Plasmon-Mediated Chiroptical Second Harmonic Generation from Seemingly Achiral Gold Nanorods

Throughout nature, simple rules explain complex phenomena, such as the selective interaction of chiral objects with circularly polarized light. Here, we demonstrate chiroptical signals from gold nanorods, which are seemingly achiral structures. Shape anisotropy due to atomic-level faceting and rounding at the tips of nanorods, which are free of chiral surface ligands, induces linear-to-circular polarization modulation during second harmonic generation. The intrinsic nanorod chiroptical response is increased by plasmon-resonant excitation, which preferentially amplifies circularly polarized harmonic signals. This structure–plasmon interplay is uniquely resolved by polarization-resolved second harmonic generation measurements. The material’s second-order polarizability is the product of the structure-dependent lattice-normal susceptibility and local surface plasmon field vectors. Synthetically scalable plasmon-supporting nanorods that amplify small circular dichroism signals provide a simple, assembly-free platform for chiroptical transduction.

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Work Title Plasmon-Mediated Chiroptical Second Harmonic Generation from Seemingly Achiral Gold Nanorods
Access
Open Access
Creators
  1. Zehua Li
  2. Lei Kang
  3. Robert W. Lord
  4. Kyoungweon Park
  5. Andrew Gillman
  6. Richard A. Vaia
  7. Raymond E. Schaak
  8. Douglas H. Werner
  9. Kenneth L. Knappenberger, Jr.
Keyword
  1. gold nanoparticle
  2. second harmonic generation
  3. plasmon
  4. chirality
  5. nonlinearity
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. ACS Nanoscience Au
Publication Date September 21, 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.1021/acsnanoscienceau.1c00014
Deposited September 09, 2024

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Version 1
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  • Created
  • Added li-et-al-2021-plasmon-mediated-chiroptical-second-harmonic-generation-from-seemingly-achiral-gold-nanorods.pdf
  • Added Creator Z Li
  • Added Creator L Kang
  • Added Creator R W Lord
  • Added Creator Park
  • Added Creator Kenneth Knappenberger
  • Published
  • Updated
  • Renamed Creator Zehua Li Show Changes
    • Z Li
    • Zehua Li
  • Renamed Creator Lei Kang Show Changes
    • L Kang
    • Lei Kang
  • Renamed Creator Robert W. Lord Show Changes
    • R W Lord
    • Robert W. Lord
  • Renamed Creator Kyoungweon Park Show Changes
    • Park
    • Kyoungweon Park
  • Renamed Creator Kenneth L. Knappenberger, Jr. Show Changes
    • Kenneth Knappenberger
    • Kenneth L. Knappenberger, Jr.
  • Added Creator Andrew Gillman
  • Added Creator Richard A. Vaia
  • Added Creator Raymond E. Schaak
  • Added Creator Douglas H. Werner
  • Updated Keyword, Related URLs, Publication Date Show Changes
    Keyword
    • gold nanoparticle, second harmonic generation, plasmon, chirality, nonlinearity
    Related URLs
    • https://pubs.acs.org/doi/full/10.1021/acsnanoscienceau.1c00014
    Publication Date
    • 2021-01-01
    • 2021-09-21
  • Updated Publisher Identifier (DOI) Show Changes
    Publisher Identifier (DOI)
    • https://doi.org/10.1021/axsnanoscienceau.1c00014
    • https://doi.org/10.1021/acsnanoscienceau.1c00014
  • Updated Related URLs Show Changes
    Related URLs
    • https://pubs.acs.org/doi/full/10.1021/acsnanoscienceau.1c00014