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Time-Domain Modeling of Metal-Dielectric Nanostructures

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Abstract

We study second-order complex Padé approximants that give a systematic approach to time-domain modeling of dispersive dielectric functions including the classical Drude, Lorentz, Sellmeier and the critical points models. The approach is utilized to compare the frequency domain with time-domain simulations of local optical responses and transmission-reflection spectra for plasmonic nanostructures. Comparisons are made using auxiliary differential equations, recursive and piecewise linear recursive convolution formulations embedded in finite-difference, finite-volume, and finite-element time-domain solvers.

© 2010 Optical Society of America

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