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On the physical significance of non-local material parameters in optical metamaterials

Venkitakrishnan, Ramakrishna 1; Augenstein, Yannick ORCID iD icon 1; Zerulla, Benedikt ORCID iD icon 2; Goffi, Fatima Z. 3; Plum, Michael 3; Rockstuhl, Carsten ORCID iD icon 1,2
1 Institut für Theoretische Festkörperphysik (TFP), Karlsruher Institut für Technologie (KIT)
2 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
3 Institut für Analysis (IANA), Karlsruher Institut für Technologie (KIT)

Abstract:

When light interacts with a material made from subwavelength periodically arranged constituents, non-local effects can emerge. They occur because of either a complicated response of the constituents or possible lattice interactions. In lowest-order approximations of a general non-local response function, phenomena like an artificial magnetism and a bi-anisotropic response emerge. However, investigations beyond these lowest-order descriptions of non-local effects are needed for optical metamaterials (MMs) where a significant long-range interaction becomes evident. This highlights the need for additional material parameters to account for spatial non-locality in an effective medium description. These material parameters emerge from a Taylor expansion of the general and exact non-local response function. Even though these non-local parameters improve the effective description, their physical significance is yet to be understood. To improve the situation, we consider a conceptional MM consisting of scatterers characterized by a prescribed multipolar response arranged on a square lattice. Lorentzian polarizabilities describe the scatterers in the electric dipolar, electric quadrupolar, and magnetic dipolar terms. ... mehr

Zugehörige Institution(en) am KIT Institut für Analysis (IANA)
Institut für Nanotechnologie (INT)
Institut für Theoretische Festkörperphysik (TFP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2023
Sprache Englisch
Identifikator ISSN: 1367-2630
KITopen-ID: 1000166051
HGF-Programm 43.32.02 (POF IV, LK 01) Designed Optical Materials
Erschienen in New Journal of Physics
Verlag Institute of Physics Publishing Ltd (IOP Publishing Ltd)
Band 25
Heft 12
Seiten Art.-Nr.: 123014
Vorab online veröffentlicht am 08.12.2023
Schlagwörter plasmonics, metamaterials, nonlocal properties, multipolar response, homogenization
Nachgewiesen in Dimensions
Web of Science
OpenAlex
Scopus

Verlagsausgabe §
DOI: 10.5445/IR/1000166051
Veröffentlicht am 22.12.2023
Originalveröffentlichung
DOI: 10.1088/1367-2630/ad1010
Scopus
Zitationen: 3
Web of Science
Zitationen: 3
Dimensions
Zitationen: 3
Seitenaufrufe: 107
seit 22.12.2023
Downloads: 122
seit 22.12.2023
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