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

dc.contributor.author Yang, Y
dc.contributor.author Akozbek, N
dc.contributor.author Kim, TH
dc.contributor.author Sanz, JM
dc.contributor.author Moreno, F
dc.contributor.author Losurdo, M
dc.contributor.author Brown, AS
dc.contributor.author Everitt, HO
dc.date.accessioned 2017-03-19T00:30:06Z
dc.date.available 2017-03-19T00:30:06Z
dc.date.issued 2014-07-16
dc.identifier.uri https://hdl.handle.net/10161/13863
dc.description.abstract © 2014 American Chemical Society.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).
dc.publisher American Chemical Society (ACS)
dc.relation.ispartof ACS Photonics
dc.relation.isversionof 10.1021/ph500042v
dc.title Ultraviolet-Visible Plasmonic Properties of Gallium Nanoparticles Investigated by Variable-Angle Spectroscopic and Mueller Matrix Ellipsometry
dc.type Journal article
duke.contributor.id Brown, AS|0296115
duke.contributor.id Everitt, HO|0043102
pubs.begin-page 582
pubs.end-page 589
pubs.issue 7
pubs.organisational-group Duke
pubs.organisational-group Electrical and Computer Engineering
pubs.organisational-group Physics
pubs.organisational-group Pratt School of Engineering
pubs.organisational-group Trinity College of Arts & Sciences
pubs.publication-status Published
pubs.volume 1
dc.identifier.eissn 2330-4022
duke.contributor.orcid Everitt, HO|0000-0002-8141-3768


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