Surface Plasmonic Lattice Solitons in Semi-Infinite Graphene Sheet Arrays

We investigate the surface plasmonic lattice solitons (PLSs) in semi-infinite graphene sheet arrays. The surface soliton is formed as the surface plasmon polaritons (SPPs) tunneling is inhibited by the graphene nonlinearity, and meanwhile the incident power should be above a threshold value. Thanks...

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Bibliographic Details
Published inJournal of lightwave technology Vol. 35; no. 14; pp. 2960 - 2965
Main Authors Wang, Zhouqing, Wang, Bing, Long, Hua, Wang, Kai, Lu, Peixiang
Format Journal Article
LanguageEnglish
Published New York IEEE 15.07.2017
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Arrays
Chemical potential
Confinement
Graphene
Graphite
Lattices
Nonlinear optics
Nonlinearity
Optical surface waves
Plasmons
Polaritons
Propagation
Propagation losses
Sheets
Solitary waves
Solitons
surface solitons
Switches
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Summary:We investigate the surface plasmonic lattice solitons (PLSs) in semi-infinite graphene sheet arrays. The surface soliton is formed as the surface plasmon polaritons (SPPs) tunneling is inhibited by the graphene nonlinearity, and meanwhile the incident power should be above a threshold value. Thanks to the strong confinement of SPPs on graphene, the effective width of surface PLSs can be squeezed into deep-subwavelength scale of ~0.002λ . The influence of the graphene loss on the surface PLSs is also discussed. Based on the stable propagation of surface PLSs, we find that the light propagation can be switched from the array boundary to the inner graphene sheets by reducing the incident power or increasing the chemical potential of graphene. The study may find promising application in optical switches on deep-subwavelength scale.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2017.2707601