  In this article, a 2D plasmonic waveguide loaded with all dielectric
anisotropic metamaterial, consisting of alternative layers of Si-SiO2, has been
theoretically proposed and numerically analyzed. Main characteristics of
waveguide i.e. propagation constant, propagation length and normalized mode
area have been calculated for different values of ridge width and height at
telecommunication wavelength. The respective 1D structure of the waveguide has
been analytically solved for the anisotropic ridge as a single uniaxial medium
with dielectric tensor defined by Effective Medium Theory (EMT). The 2D
structure has been analyzed numerically through FEM simulation using Mode
analysis module in Comsol Multiphysics. Both the EMT and real multilayer
structure have been considered in numerical simulations. Such structure with
all dielectric metamaterial provides an extra degree of freedom namely fill
factor, fraction of Si layer in a Si-SiO2 unit cell, to tune the propagation
characteristics compared to the conventional DLSSP waveguide. A wide range of
variations in all the characteristics have been observed for different fill
factor values. Besides, the effect of the first interface layer has also been
considered. Though all dielectric metamaterial has already been utilized in
photonic waveguide as cladding, the implementation in plasmonic waveguide has
not been investigated yet to our best knowledge. The proposed device might be a
potential in deep sub-wavelength optics, PIC and optoelectronics.
