Recently, the concept of double-negative (negative ε and negative µ) materials has achieved remarkable importance due to the exhibition of unusual electromagnetic properties different from the known materials. These phenomena are observed in microwave, millimeter-wave, and optical frequency bands. The materials of double negativity are called metamaterials or Left-Handed Materials (LHMs). These are hand made structures that can be designed to exhibit specific phenomena not commonly found in nature. The LHM is a composite material in which both the electric permittivity ε and the magnetic permeability µ are simultaneously negative. The history of these materials begins with the work of Veselago [1], who proposed a medium with simultaneously negative ε and μ and studied the propagation of electromagnetic waves in such a medium. He predicted a number of unusual features of waves in LHMs, including negative index of refraction, the reversal of Doppler effect, and Pointing vector is antiparallel to phase velocity. Pendry et al [2] presented the artificial metallic construction of periodic rods whic