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Proceedings Paper

One-way EM waveguide formed at the interface between metal and uniformly magnetized two-dimensional photonic crystal fabricated from magneto-optic material
Author(s): Sergey Eyderman; Vladimir Kuzmiak; Mathias Vanwolleghem
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Paper Abstract

We have demonstrated numerically that a waveguide formed by the interface of a metal and uniformly magnetized twodimensional photonic crystal fabricated from a transparent dielectric magneto-optic (MO) material possesses a one-way frequency range where only a forward propagating surface plasmon polariton (SPP) mode is allowed to propagate. In contrast to an analogous waveguide proposed by Yu1 the non-reciprocity at the interface is introduced by the MO properties of the photonic crystal material and not by applying an unrealistically high static magnetic field (up to 1 T) on metal described by free-electron Drude form of the dielectric function. The considered magnetic material is Bismuth Iron Garnet (BIG, Bi3Fe5O12), a ferrimagnetic oxide which may be easily magnetically saturated by fields of the order of tens of mT. Therefore, this configuration allows to achieve sizable one-way bandwidth by using significantly smaller values of the external magnetic field which makes such a waveguide favorable for design of diode-like elements in optical integrated circuits. By using a novel MO aperiodic Fourier Modal Method (MO a-FMM) to calculate the band structure of this magneto-plasmonic photonic crystal waveguide we have proven the existence of one-way SPP bands within the optical wavelength.To investigate transport properties of the structures within this frequency range we have implemented two finite-difference time-domain (FDTD) methods, namely ADE2 and that based on Z-transforms3 that allow calculating the propagation of EM waves through media with full tensorial magneto-optic permittivity. We provide numerical evidence confirming suppression of disorder-induced backscattering in the one-way waveguide.

Paper Details

Date Published: 13 May 2010
PDF: 12 pages
Proc. SPIE 7713, Photonic Crystal Materials and Devices IX, 77130P (13 May 2010); doi: 10.1117/12.854545
Show Author Affiliations
Sergey Eyderman, Institute of Photonics and Electronics ASCR, v.v.i. (Czech Republic)
Vladimir Kuzmiak, Institute of Photonics and Electronics ASCR, v.v.i. (Czech Republic)
Mathias Vanwolleghem, Institut d'Électronique Fondamentale, CNRS, Univ. de Paris-Sud-11 (France)

Published in SPIE Proceedings Vol. 7713:
Photonic Crystal Materials and Devices IX
Hernán R. Míguez; Sergei G. Romanov; Lucio Claudio Andreani; Christian Seassal, Editor(s)

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