Photoluminescence Revealed Higher Order Plasmonic Resonance Modes and Their Unexpected Frequency Blue Shifts in Silver-Coated Silica Nanoparticle Antennas
AuthorRahman, Atta Ur
Ziolkowski, Richard W.
Rehman, Sami Ur
AffiliationUniv Arizona, Dept Elect & Comp Engn
higher order modes
size-dependent optical losses
MetadataShow full item record
CitationRahman, 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.
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AbstractFeatured 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.
NoteOpen access journal
VersionFinal published version
SponsorsNational Natural Science Foundation of China [61571289, 61571298]; Australian Research Council [DP160102219]