Photoluminescence Revealed Higher Order Plasmonic Resonance Modes and Their Unexpected Frequency Blue Shifts in Silver-Coated Silica Nanoparticle Antennas
Author
Rahman, Atta UrGeng, Junping
Ziolkowski, Richard W.
Hang, Tao
Hayat, Qaisar
Liang, Xianling
Rehman, Sami Ur
Jin, Ronghong
Affiliation
Univ Arizona, Dept Elect & Comp EngnIssue Date
2019-07-26Keywords
core-shell nanoparticlenanoantenna
blue shift
higher order modes
size-dependent optical losses
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MDPICitation
Rahman, A.U.; Geng, J.; Ziolkowski, R.W.; Hang, T.; Hayat, Q.; Liang, X.; Rehman, S.U.; Jin, R. Photoluminescence Revealed Higher Order Plasmonic Resonance Modes and Their Unexpected Frequency Blue Shifts in Silver-Coated Silica Nanoparticle Antennas. Appl. Sci. 2019, 9, 3000.Journal
APPLIED SCIENCES-BASELRights
Copyright © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Featured Application Core-shell nanoparticle antennas facilitate the realization of optical metamaterials (engineered artificial materials). Their presence and tunable scattering properties enhance a variety of biological sensing and imaging modalities. Abstract Higher order plasmonic resonance modes and their frequency blue shifts in silver-coated silica nanoparticle antennas are studied. Synthesizing them with a wet chemistry method, silica (SiO2) nanoparticles were enclosed within silver shells with different thicknesses. A size-dependent Drude model was used to model the plasmonic shells and their optical losses. Two higher order plasmonic resonances were identified for each case in these simulations. The photoluminescence spectroscopy (PL) experimental results, in good agreement with their simulated values, confirmed the presence of those two higher order resonant modes and their resonance frequencies. When compared with pure metallic Ag nanoparticles, size-induced blue shifts were observed in these resonance frequencies.Note
Open access journalISSN
2076-3417Version
Final published versionSponsors
National Natural Science Foundation of China [61571289, 61571298]; Australian Research Council [DP160102219]ae974a485f413a2113503eed53cd6c53
10.3390/app9153000
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Except where otherwise noted, this item's license is described as Copyright © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).