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A quantum mechanical study of optical excitations in nanodisk plasmonic oligomers

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Abstract

Using state-of-the-art quantum-mechanical calculations, we investigate the optical excitations in plasmonic nanodisk oligomers. We show that different tuning parameters such as the constitution (size and intrinsic optical properties of individual nanodisks), configuration (number of satellite nanodisks), and the spatial arrangement of satellite nanodisks critically influence the optical features of nanodisk oligomers. Our theoretical results demonstrate significantly enhanced absorption in nanodisk oligomers in comparison to individual nanodisks and, additionally, vivid optical modulations due to the creation of nanodisk oligomer homotops. Transition density maps corresponding to the main peaks in the absorption spectra provided new insight into the nature of the optical excitations. The insights gained from this theoretical study will be useful in the design of novel plasmonic nanodisk oligomers.

Graphical abstract: A quantum mechanical study of optical excitations in nanodisk plasmonic oligomers

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Publication details

The article was received on 17 Aug 2019, accepted on 20 Nov 2019 and first published on 28 Nov 2019


Article type: Paper
DOI: 10.1039/C9CP04566J
Phys. Chem. Chem. Phys., 2019, Advance Article

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    A quantum mechanical study of optical excitations in nanodisk plasmonic oligomers

    J. H. Mokkath, Phys. Chem. Chem. Phys., 2019, Advance Article , DOI: 10.1039/C9CP04566J

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