English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Efficient modeling of dispersive materials via time-domain simulations of theMaxwell equations relies on the technique of auxiliary differential equations.In this approach, a material's frequency-dependent permittivity is representedvia a sum of rational functions, e.g. Lorentz-poles, and the associated freeparameters are determined by fitting to experimental data. In the present work,we present a modified approach for plasmonic materials that requiresconsiderably fewer fit parameters than traditional approaches. Specifically, weconsider the underlying microscopic theory and, in the frequency domain,separate the hydrodynamic contributions of the quasi-free electrons inpartially filled bands from the interband transitions. As an illustration, weapply our approach to gold and demonstrate how to treat the interbandtransitions within the effective model via connecting to the underlyingelectronic bandstructure, thereby assigning physical meaning to the remainingfit parameters. Finally, we show how to utilize this approach within thetechnique of auxiliary differential equations. Our approach can be extended toother plasmonic materials and leads to efficient time-domain simulations ofplasmonic structures for frequency ranges where interband transitions have tobe considered.

Time-domain modeling of interband transitions in plasmonic systems