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Ultraviolet-Visible Plasmonic Properties of Gallium Nanoparticles Investigated by Variable-Angle Spectroscopic and Mueller Matrix Ellipsometry

Publication ,  Journal Article
Yang, Y; Akozbek, N; Kim, TH; Sanz, JM; Moreno, F; Losurdo, M; Brown, AS; Everitt, HO
Published in: ACS Photonics
July 16, 2014

Self-assembled, irregular ensembles of hemispherical Ga nanoparticles (NPs) were deposited on sapphire by molecular beam epitaxy. These samples, whose constituent unimodal or bimodal distribution of NP sizes was controlled by deposition time, exhibited localized surface plasmon resonances tunable from the ultraviolet to the visible (UV/vis) spectral range. The optical response of each sample was characterized using a variable-angle spectroscopic ellipsometer, and the dielectric response of the ensemble of NPs on each sample was parametrized using Lorentz oscillators. From this, a relationship was found between NP size and the deduced Lorentzian parameters (resonant frequency, damping, oscillator strength) for most unimodal and bimodal samples at most frequencies and angles of incidence. However, for samples with a bimodal size distribution, Mueller matrix ellipsometry revealed nonspecular scattering at particular frequencies and angles, suggesting a resonant interparticle coupling effect consistent with recently observed strong local field enhancements in the ultraviolet. (Graph presented).

Duke Scholars

Published In

ACS Photonics

DOI

EISSN

2330-4022

Publication Date

July 16, 2014

Volume

1

Issue

7

Start / End Page

582 / 589

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 0906 Electrical and Electronic Engineering
  • 0206 Quantum Physics
  • 0205 Optical Physics
 

Citation

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Chicago
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MLA
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Yang, Y., Akozbek, N., Kim, T. H., Sanz, J. M., Moreno, F., Losurdo, M., … Everitt, H. O. (2014). Ultraviolet-Visible Plasmonic Properties of Gallium Nanoparticles Investigated by Variable-Angle Spectroscopic and Mueller Matrix Ellipsometry. ACS Photonics, 1(7), 582–589. https://doi.org/10.1021/ph500042v
Yang, Y., N. Akozbek, T. H. Kim, J. M. Sanz, F. Moreno, M. Losurdo, A. S. Brown, and H. O. Everitt. “Ultraviolet-Visible Plasmonic Properties of Gallium Nanoparticles Investigated by Variable-Angle Spectroscopic and Mueller Matrix Ellipsometry.” ACS Photonics 1, no. 7 (July 16, 2014): 582–89. https://doi.org/10.1021/ph500042v.
Yang Y, Akozbek N, Kim TH, Sanz JM, Moreno F, Losurdo M, et al. Ultraviolet-Visible Plasmonic Properties of Gallium Nanoparticles Investigated by Variable-Angle Spectroscopic and Mueller Matrix Ellipsometry. ACS Photonics. 2014 Jul 16;1(7):582–9.
Yang, Y., et al. “Ultraviolet-Visible Plasmonic Properties of Gallium Nanoparticles Investigated by Variable-Angle Spectroscopic and Mueller Matrix Ellipsometry.” ACS Photonics, vol. 1, no. 7, July 2014, pp. 582–89. Scopus, doi:10.1021/ph500042v.
Yang Y, Akozbek N, Kim TH, Sanz JM, Moreno F, Losurdo M, Brown AS, Everitt HO. Ultraviolet-Visible Plasmonic Properties of Gallium Nanoparticles Investigated by Variable-Angle Spectroscopic and Mueller Matrix Ellipsometry. ACS Photonics. 2014 Jul 16;1(7):582–589.
Journal cover image

Published In

ACS Photonics

DOI

EISSN

2330-4022

Publication Date

July 16, 2014

Volume

1

Issue

7

Start / End Page

582 / 589

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 0906 Electrical and Electronic Engineering
  • 0206 Quantum Physics
  • 0205 Optical Physics