LAUSR

A novel circular shaped metamaterial optical fiber with semiconductor core, metal/dielectric clad is numerically investigated. To surpass higher absorption loss and instability of noble metal, the core guiding medium of the fiber is comprised by crystalline germanium (Ge). The fiber is interrogated in terms of uniaxial permittivity, mode index, dispersion profile, effective area, nonlinearity, power fraction for different thickness (C m  = C d , C m  > C d, C m  < C d ) of Ag/Al 2 O 3 using finite element method. In addition, it is shown how increased Ag/Al 2 O 3 pair enhances optical properties especially for low loss which is reported as 0.025 dB/m with AMM cladding and 0.007 dB/m for layered cladding region. Hence, the proposed structure with comprising material is a promising candidate for mid-infrared applications.