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Amir Madani

Amir Madani

Academic rank: Associate Professor
ORCID:
Education: PhD.
ScopusId:
HIndex: 0/00
Faculty: Faculty of Basic Sciences
Address:
Phone: 041-61811644

Research

Title
Tunable surface waves in nonlinear graphene-based one-dimensional-photonic crystal
Type
JournalPaper
Keywords
graphene-based photonic crystal; nonlinear surface waves; graphene chemical potential; tunability
Year
2017
Journal Journal of Nanophotonics
DOI
Researchers Babak Tavakkoly Moghaddam ، Samad Roshan Entezar ، Ebrahim Safari ، Amir Madani

Abstract

The nonlinear TE surface waves guided by an interface of a semi-infinite Kerr-type dielectric medium and a one-dimensional graphene-based photonic crystal have been investigated using the transfer-matrix method. It is shown that increasing the intensity of the incident beam drastically changes dispersion behavior inside the graphene-induced photonic band gap as a result of nonlinearity. Also regarding the simulation results, it reveals that the peculiar dispersion that is governed by a nonlinear structure appeared to be tuned by graphene conductivity via an external electric field. Applying such an electric field makes it possible to easily tune the nonlinear surface waves at the desired frequency only by adjusting the chemical potential of the graphene. Also, it is shown that for application purposes, the results of studies can be applied to the case in which graphene nanolayers are embedded by identical dielectric constant, i.e., zero permittivity contrast of dielectric.