Axial Toroidal Dipole Modes in All-Dielectric Trimer Metasurfaces

被引：0

作者：

Kupriianov, Anton S. ^{[1
,2
]}

Tuz, Vladimir R. ^{[1
,3
,4
]}

Khardikov, Vyacheslav V. ^{[4
,5
]}

Han, Wei ^{[1
,2
]}

Kivshar, Yu. S. ^{[6
]}

机构：

[1] Jilin Univ, Int Ctr Future Sci, Changchun, Jilin, Peoples R China

[2] Jilin Univ, Coll Phys, Changchun, Jilin, Peoples R China

[3] Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun, Jilin, Peoples R China

[4] Natl Acad Sci Ukraine, Inst Radio Astron, Kharkov, Ukraine

[5] Kharkov Natl Univ, Sch Radio Phys, Kharkov, Ukraine

[6] Australian Natl Univ, Nonlinear Phys Ctr, Canberra, ACT 2601, Australia

来源：

2018 IEEE 17TH INTERNATIONAL CONFERENCE ON MATHEMATICAL METHODS IN ELECTROMAGNETIC THEORY (MMET) | 2018年

关键词：

metasurfaces; trapped modes; subwavelength structures; nanostructures;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We demonstrate how to excite a resonant state resembling an axial toroidal dipole in metasurfaces made of particle clusters composed of three dielectric disks (trimers). The toroidal dipole response appears due to a symmetry breaking in the cluster geometry, via an energy release from an electromagnetic trapped (dark) mode. We consider several designs of metasurfaces where an asymmetry is introduced into the cluster by either employing disks of different radii or identical disks with holes. We discuss in detail the effect of different asymmetries in metasurface's geometry on characteristics of the axial toroidal dipole response.

引用

页码：274 / 277

页数：4

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