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Proceedings Paper

Strong magnetic resonance of coupled aluminum nanodisks on top of a silicon waveguide
Author(s): Irene Alepuz-Benache; Carlos García-Meca; Francisco J. Rodríguez-Fortuño; Rubén Ortuño; María Lorente-Crespo; Amadeu Griol; Alejandro Martínez
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Paper Abstract

We study the electromagnetic behavior of a structure consisting of coupled aluminum nanodisks on a silicon waveguide at telecom wavelengths. Numerical simulations show that the fundamental TE-like waveguide mode excites a localized magnetic plasmon resonance between adjacent nanodisks with suitable dimensions, leading to transmission dips. For a sufficient number of disks (periodically distributed along the propagation direction), the structure supports a magnetic mode arising from a magneto-inductive coupling between neighboring nanodisks, as revealed by an Eigenmode analysis. The transmission response of the samples was measured for both polarizations through an end-fire set-up, confirming that the strong resonances are only present for TE polarization. Measurements and simulations are in good agreement, showing that the resonances strength is maximized for three coupled nanodisks.

Paper Details

Date Published: 9 May 2012
PDF: 9 pages
Proc. SPIE 8424, Nanophotonics IV, 84242J (9 May 2012);
Show Author Affiliations
Irene Alepuz-Benache, Univ. Politécnica de Valencia (Spain)
Carlos García-Meca, Univ. Politécnica de Valencia (Spain)
Francisco J. Rodríguez-Fortuño, Univ. Politécnica de Valencia (Spain)
Rubén Ortuño, Univ. Politécnica de Valencia (Spain)
María Lorente-Crespo, Univ. Politécnica de Valencia (Spain)
Amadeu Griol, Univ. Politécnica de Valencia (Spain)
Alejandro Martínez, Univ. Politécnica de Valencia (Spain)

Published in SPIE Proceedings Vol. 8424:
Nanophotonics IV
David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)

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