A Library of Late Transition Metal Alloy Dielectric Functions for Nanophotonic Applications
Artikel i vetenskaplig tidskrift, 2020

Accurate complex dielectric functions are critical to accelerate the development of rationally designed metal alloy systems for nanophotonic applications, and to thereby unlock the potential of alloying for tailoring nanostructure optical properties. To date, however, accurate alloy dielectric functions are widely lacking. Here, a time-dependent density-functional theory computational framework is employed to compute a comprehensive binary alloy dielectric function library for the late transition metals most commonly employed in plasmonics (Ag, Au, Cu, Pd, Pt). Excellent agreement is found between electrodynamic simulations based on these dielectric functions and selected alloy systems experimentally scrutinized in 10 at% composition intervals. Furthermore, it is demonstrated that the dielectric functions can vary in very non-linear fashion with composition, which paves the way for non-trivial optical response optimization by tailoring material composition. The presented dielectric function library is thus a key resource for the development of alloy nanomaterials for applications in nanophotonics, optical sensors, and photocatalysis.

optical response

nanoalloys

time-dependent density-functional theory

nanofabrication

Författare

Magnus Rahm

Chalmers, Fysik, Kondenserad materie- och materialteori

Christopher Tiburski

Chalmers, Fysik, Kemisk fysik

Tuomas Rossi

Chalmers, Fysik, Material- och ytteori

Ferry Nugroho

Chalmers, Fysik, Kemisk fysik

Sara Nilsson

Chalmers, Fysik, Kemisk fysik

Christoph Langhammer

Chalmers, Fysik, Kemisk fysik

Paul Erhart

Chalmers, Fysik, Kondenserad materie- och materialteori

Advanced Functional Materials

1616-301X (ISSN)

Vol. In Press

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

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

Styrkeområden

Nanovetenskap och nanoteknik (SO 2010-2017, EI 2018-)

Ämneskategorier

Atom- och molekylfysik och optik

Den kondenserade materiens fysik

Infrastruktur

Chalmers materialanalyslaboratorium

Nanotekniklaboratoriet

DOI

10.1002/adfm.202002122

Relaterade dataset

DOI: 10.5281/zenodo.3822037

Mer information

Senast uppdaterat

2020-08-27