Strong coupling in hybrid metal-dielectric nanoresonators

Date

2017

Authors

Decker, Manuel
Staude, Isabelle
Pertsch, Thomas

Journal Title

Journal ISSN

Volume Title

Publisher

Royal Society of London

Abstract

We study resonant photonic–plasmonic coupling between a gold dipole nanoantenna and a silicon nanodisc supporting electric and magnetic dipolar Mie-type resonances. Specifically, we consider two different cases for the mode structure of the silicon nanodisc, namely spectrally separate and spectrally matching electric and magnetic dipolar Mie-type resonances. In the latter case, the dielectric nanoparticle scatters the far fields of a unidirectional Huygens’ source. Our results reveal an anticrossing of the plasmonic dipole resonance and the magnetic Mie-type dipole resonance of the silicon nanodisc, accompanied by a clear signature of photonic–plasmonic mode hybridization in the corresponding mode profiles. These characteristics show that strong coupling is established between the two different resonant systems in the hybrid nanostructure. Furthermore, our results demonstrate that in comparison with purely metallic or dielectric nanostructures, hybrid metal–dielectric nanoresonators offer higher flexibility in tailoring the fractions of light which are transmitted, absorbed and reflected by the nanostructure over a broad range of parameters without changing its material composition. As a special case, highly asymmetric reflection and absorption properties can be achieved.

Description

Keywords

Citation

Source

Philosophical Transactions of the Royal Society Series A

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1098/rsta.2016.0312

Restricted until

2037-12-31