Optical control of graphene plasmon using liquid crystal layer 29K New One
Technical Report,01 Jul 2015,30 Jun 2016
SCIENCE AND TECHNOLOGY CENTER IN UKRAINE KYIV Ukraine
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The project is devoted to the basic research and establishes possible optical ways to control the surface plasmon polariton in graphene layer. A system comprises the graphene ribbons grating placed between a nematic liquid crystal LC and an isotropic dielectric. Incident lightwave excites a plasmon in the graphene ribbons, which influences the light propagation in the system. The grating structure of the grapheme monolayer is necessary to provide the plasmon excitation because there is a huge wave vector mismatch between the graphene plasmonic wave and the incident electromagnetic wave. In graphene structures the resonant plasmon frequency depends on the dielectric properties of layers placed above and below the graphene sheet or ribbon. In our case, it means that plasmon frequency must depend on the LC dielectric permittivity. The LC dielectric permittivity depends on the LC director orientational state, which can be controlled by external field. Therefore, a propagation of the surface plasmon polariton in graphene layer can be tuned by reorienting the LC director using external electric or magnetic fields.
- Laminates and Composite Materials
- Plasma Physics and Magnetohydrodynamics