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Linear and Nonlinear Transmission of Surface Plasmon Polaritons in an Optical Nanowire

Published online by Cambridge University Press:  01 February 2011

N. C. Panoiu  and
R. M. Osgood Jr
N. C. Panoiu
Affiliation:
Department of Applied Physics and Applied Mathematics, Columbia University, 500. W. 120th Street, New York, NY 10027
R. M. Osgood Jr
Affiliation:
Department of Applied Physics and Applied Mathematics, Columbia University, 500. W. 120th Street, New York, NY 10027
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Abstract

Polymer-metal composites offer the possibility of strongly enhanced nonlinear optical properties, which can be used for ultrasmall photonic devices. In this paper, we investigate numerically, by means of the finite-difference time-domain (FDTD) method, the propagation characteristics of surface plasmon polariton (SPP) modes excited in an optical nanowire consisting of a chain of either metallic cylinders or metallic spheres embedded in dielectric shells made of polymers (or other material) with optical Kerr nonlinearity. Our FDTD calculations incorporate both the nonlinear optical response of the dielectrics as well as the frequency dispersion of the metals, which is considered to obey a Drude-like model. It is demonstrated that, in the linear limit, the nanowire supports two SPP modes, a transverse and a longitudinal one, separated by Δλ = 20 nm. Furthermore, the dependence of the transmission of these SPP modes, on both the pulse peak power and Kerr coefficient of the dielectric shell, is investigated. Nonlinear optical phenomena, such as power-dependent mode frequency, switching, or optical limiting, are observed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 846: Symposium DD – Organic and Nanocomposite Optical Materials , 2004 , DD5.6
Copyright
Copyright © Materials Research Society 2005

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