Please use this identifier to cite or link to this item: https://doi.org/10.1038/ncomms15271
Title: Tunable and low-loss correlated plasmons in Mott-like insulating oxides
Authors: Asmara T.C. 
Wan D. 
Zhao Y. 
Majidi M.A. 
Nelson C.T.
Scott M.C.
Cai Y.
Yan B.
Schmidt D. 
Yang M. 
Zhu T. 
Trevisanutto P.E. 
Motapothula M.R. 
Feng Y.P. 
Breese M.B.H. 
Sherburne M.
Asta M.
Minor A.
Venkatesan T. 
Rusydi A. 
Keywords: oxide
oxygen
strontium
electron
insulation
oxide
oxygen
ultraviolet radiation
visible spectrum
wavelength
Article
chemical interaction
density functional theory
dielectric constant
electric conductivity
electricity
ellipsometry
molecular weight
oscillation
oxygen tension
room temperature
spectroscopic ellipsometry
transmission electron microscopy
Issue Date: 2017
Publisher: Nature Publishing Group
Citation: Asmara T.C., Wan D., Zhao Y., Majidi M.A., Nelson C.T., Scott M.C., Cai Y., Yan B., Schmidt D., Yang M., Zhu T., Trevisanutto P.E., Motapothula M.R., Feng Y.P., Breese M.B.H., Sherburne M., Asta M., Minor A., Venkatesan T., Rusydi A. (2017). Tunable and low-loss correlated plasmons in Mott-like insulating oxides. Nature Communications 8 : 15271. ScholarBank@NUS Repository. https://doi.org/10.1038/ncomms15271
Abstract: Plasmonics has attracted tremendous interests for its ability to confine light into subwavelength dimensions, creating novel devices with unprecedented functionalities. New plasmonic materials are actively being searched, especially those with tunable plasmons and low loss in the visible-ultraviolet range. Such plasmons commonly occur in metals, but many metals have high plasmonic loss in the optical range, a main issue in current plasmonic research. Here, we discover an anomalous form of tunable correlated plasmons in a Mott-like insulating oxide from the Sr 1-x Nb 1-y O 3+? family. These correlated plasmons have multiple plasmon frequencies and low loss in the visible-ultraviolet range. Supported by theoretical calculations, these plasmons arise from the nanometre-spaced confinement of extra oxygen planes that enhances the unscreened Coulomb interactions among charges. The correlated plasmons are tunable: They diminish as extra oxygen plane density or film thickness decreases. Our results open a path for plasmonics research in previously untapped insulating and strongly-correlated materials. © The Author(s) 2017.
Source Title: Nature Communications
URI: https://scholarbank.nus.edu.sg/handle/10635/174493
ISSN: 2041-1723
DOI: 10.1038/ncomms15271
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