Open AccessMagnetic modulation of mid-infrared plasmons using Giant Magnetoresistance
Author(s) -
G. Armelles,
A. Cebollada,
Fernando Garcı́a,
Carlos Pecharromán
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.018784
Subject(s) - plasmon , magnetoresistance , modulation (music) , materials science , magnetic field , infrared , dielectric , optics , optoelectronics , condensed matter physics , surface plasmon , giant magnetoresistance , colossal magnetoresistance , physics , acoustics , quantum mechanics
We propose a novel approach to generate active mid IR plasmonic systems by incorporating giant magnetoresistance as the driving mechanism. The magnetic field induced change in resistivity in Ni 81 Fe 19 /Au multilayers directly affects the diagonal elements of the dielectric tensor of the system, mainly in the mid IR range, via the magnetorefractive effect. With magnetic fields as small as 50 Oe, we postulate the possibility to modulate the response of such continuous and patterned structures in a contactless, easy to implement fashion. The potential application impact of this modulation concept is analyzed.