Theoretical description of bifacial optical nanomaterials

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2013
Major/Subject
Mcode
Degree programme
Language
en
Pages
16
23471-23485
Series
OPTICS EXPRESS, Volume 21, issue 20
Abstract
In general, optical nanomaterials composed of noncentrosymmetric nanoscatterers are bifacial, meaning that two counter-propagating waves inside the material behave differently. Thus far a practical theory for the description of such materials has been missing. Herein, we present a theory that connects the design of the bifacial nanomaterial’s “atoms” with the refractive index and wave impedance of the medium. We also introduce generalized Fresnel coefficients and investigate the role of electromagnetic multipoles on the bifaciality. We find that in any material two counter-propagating waves must experience the same refractive index, but their impedances can differ. The model is demonstrated in practice by the design of a nanomaterial slab with one of its facets being optically reflective, while the other being totally non-reflective.
Description
Keywords
optical nanomaterials, spatial dispersion, wave parameters
Other note
Citation
Grahn , P , Shevchenko , A & Kaivola , M 2013 , ' Theoretical description of bifacial optical nanomaterials ' , Optics Express , vol. 21 , no. 20 , pp. 23471-23485 . https://doi.org/10.1364/OE.21.023471