A Library of Late Transition Metal Alloy Dielectric Functions for Nanophotonic Applications
| Autor: | Paul Erhart, Sara Nilsson, Ferry Anggoro Ardy Nugroho, Christopher Tiburski, J. Magnus Rahm, Christoph Langhammer, Tuomas P. Rossi |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Nanostructure
Materials science Atom and Molecular Physics and Optics Alloy Nanophotonics Physics::Optics 02 engineering and technology Dielectric engineering.material 010402 general chemistry 01 natural sciences Nanomaterials Biomaterials Condensed Matter::Materials Science Electrochemistry Plasmon optical response business.industry Time-dependent density functional theory 021001 nanoscience & nanotechnology Condensed Matter Physics time-dependent density-functional theory 0104 chemical sciences Electronic Optical and Magnetic Materials Nanolithography nanoalloys engineering Optoelectronics nanofabrication 0210 nano-technology business |
| Zdroj: | Advanced Functional Materials (1616-301X) vol.30(2020) Advanced Functional Materials |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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