Abstract
In this paper, we present a nanoscale all-angle waveguide based on plasmon band effect in
triangular array of multiwall carbon nanotubes (MWCNTs) which propagates the light beam in
structure for any incident angle. We analyze photonic characteristics of the proposed MWCNT based
nanoscale structure using finite-difference time-domain method. Multi pole Drude-Lorentz model is
used for dispersive dielectric function of MWCNTs. Using this model, photonic properties of
triangular MWCNT based photonic crystal like band structure, reflection and transmission
coefficients are calculated and the effects of different structural parameters are studied for
engineering the desired band structure. The MWCNT array with 20 nm lattice constant is designed in
Silicon as a host. Considering coupled plasmonic-Bragg guided mode, we create a tunable optical
waveguide by inserting engineered line defects of MWCNTs inside the structure.
© 2013 IEEE
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