Scattering properties of meta-atoms

被引：51

作者：

Rockstuhl, C. ^{[1
]}

Menzel, C. ^{[1
]}

Muehlig, S. ^{[1
]}

Petschulat, J. ^{[2
]}

Helgert, C. ^{[2
]}

Etrich, C. ^{[2
]}

Chipouline, A. ^{[2
]}

Pertsch, T. ^{[2
]}

Lederer, F. ^{[1
]}

机构：

[1] Univ Jena, Inst Condensed Matter Phys & Solid State Opt, D-07743 Jena, Germany

[2] Univ Jena, Abbe Ctr Photon, Inst Appl Phys, D-07743 Jena, Germany

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 24期

关键词：

NEGATIVE REFRACTIVE-INDEX; SPLIT-RING RESONATORS; METAMATERIALS; FREQUENCIES; PARTICLES;

D O I：

10.1103/PhysRevB.83.245119

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Metamaterials consist of a periodic or aperiodic arrangement of so-called meta-atoms. Usually their optical properties are derived from the collective response of this ensemble. However, it is highly desirable to deduce them from the scattering properties of individual meta-atoms because frequently the periodic arrangement has a spurious effect on the desired functionality. Moreover, understanding the scattering properties of individual meta-atoms permits introducing guidelines for their design and predicting effective properties of amorphous metamaterials. To achieve this we introduce a genuine approach to quantify the properties of individual meta-atoms. To this end we evaluate spectrally resolved the composition of the rigorously calculated scattered field in terms of contributions of electromagnetic multipoles, such as electric and magnetic dipoles, quadrupoles and, in principle, arbitrary higher order moments. Beyond its direct application to metamaterial's design and characterization, the approach will be significant in the entire field of nanooptics as, for example, for optical nanoantennas.

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