Plasmon excitations in chemically heterogeneous nanoarrays
Artikel i vetenskaplig tidskrift, 2020

The capability of collective excitations, such as localized surface plasmon resonances, to produce a versatile spectrum of optical phenomena is governed by the interactions within the collective and single-particle responses in the finite system. In many practical instances, plasmonic metallic nanoparticles and arrays are either topologically or chemically heterogeneous, which affects both the constituent transitions and their interactions. Here, the formation of collective excitations in weakly Cu- and Pd-doped Au nanoarrays is described using time-dependent density functional theory. The additional impurity-induced modes in the optical response can be thought to result from intricate interactions between separated excitations or transitions. We investigate the heterogeneity at the impurity level, the symmetry aspects related to the impurity position, and the influence of the impurity position on the confinement phenomena. The chemically rich and symmetry-dependent quantum mechanical effects are analyzed with transition contribution maps demonstrating the possibility to develop nanostructures with more controlled collective properties.

Författare

Kevin Conley

Aalto-Yliopisto

Neha Nayyar

University of Central Florida

Tuomas Rossi

Chalmers, Fysik, Material- och ytteori

Mikael Kuisma

Jyväskylän Yliopisto

Volodymyr Turkowski

University of Central Florida

Martti J. Puska

Aalto-Yliopisto

Talat S. Rahman

Aalto-Yliopisto

University of Central Florida

PHYSICAL REVIEW B

2469-9950 (ISSN) 2469-9969 (eISSN)

Vol. 101 23 235132

Towards nanoscale reality in plasmonic hot-carrier generation (RealNanoPlasmon)

Europeiska kommissionen (Horisont 2020), 2019-04-01 -- 2021-03-31.

Ämneskategorier

Atom- och molekylfysik och optik

Den kondenserade materiens fysik

DOI

10.1103/PhysRevB.101.235132

Relaterade dataset

DOI: 10.5281/zenodo.3860069

Mer information

Senast uppdaterat

2020-08-19