Switchable plasmonic routers controlled by external magnetic fields by using magneto-plasmonic waveguides.

Abstract:

:We analytically and numerically investigate magneto-plasmons in metal films surrounded by a ferromagnetic dielectric. In such waveguide using a metal film with a thickness exceeding the Skin depth, an external magnetic field in the transverse direction can induce a significant spatial asymmetry of mode distribution. Superposition of the odd and the even asymmetric modes over a distance leads to a concentration of the energy on one interface which is switched to the other interface by the magnetic field reversal. The requested magnitude of magnetization is exponentially reduced with the increase of the metal film thickness. Based on this phenomenon, we propose a waveguide-integrated magnetically controlled switchable plasmonic routers with 99-%-high contrast within the optical bandwidth of tens of THz. This configuration can also operate as a magneto-plasmonic modulator.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Ho KS,Im SJ,Pae JS,Ri CS,Han YH,Herrmann J

doi

10.1038/s41598-018-28567-8

subject

Has Abstract

pub_date

2018-07-12 00:00:00

pages

10584

issue

1

issn

2045-2322

pii

10.1038/s41598-018-28567-8

journal_volume

8

pub_type

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