...researchers because these media can support negative reflection and refraction. That is; when a perfect electric conductor (PEC) interface is placed in a chiral nihility medium, only a backward wave can be seen as a reflected wave, whereas in chiral media two reflected forward waves can exist [7,22-25]. is the modal effective refractive index. For guided modes to occur within the core and evanescent tails within the cladding we require: 0 and 0 2 2 2 2 c f k k . For surface modes to evolve along an interface between two media, opposite permittivity and permeability (such as DNM and chiral material as in our study) must be realized [26] along that interface. Since these waves decay exponentially far away from the interface in both...
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