Padé approximant spectral fit for FDTD simulation of graphene in the near infrared

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Abstract

A parameterization of the dispersive conductivity of highly-doped graphene has been developed and is presented for use in finite-difference time-domain simulation of near infrared graphene-based photonic and plasmonic devices. The parameterization is based on fitting a Padé approximant to the conductivity arising from interband electronic transitions. The resulting parameterization provides an accurate spectral representation of the conductivity in the wavelength range 1.3-2.3μm which is important for near infrared graphene plasmonics. Finite-difference time-domain simulations of straight graphene plasmonic waveguides of infinite and finite width are presented.

Original languageEnglish
Pages (from-to)771-781
Number of pages11
JournalOptical Materials Express
Volume2
Issue number6
DOIs
StatePublished - 2012

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