Experimental demonstration of negative index of refraction

Abstract

We introduce an improved and simplified structure made of periodic arrays of pairs of H-shaped metallic wires that offer a potentially simpler approach in building negative-index materials. Using simulations and microwave experiments, we have investigated the negative-index n properties of these structures. We have measured experimentally both the transmittance and the reflectance properties and found unambiguously that a negative refractive index with Re(n)<0 and Im(n) <Re(n). The same is true for epsilon and mu. Our results show that H-shaped wire pairs can be used very effectively in producing materials with negative refractive indices.

References in corpus (5)

• Determination of Effective Permittivity and Permeability of Metamaterials from Reflection and Transmission Coefficients
• Negative Index of Refraction in Optical Metamaterials
• Demonstration of Near-Infrared Negative-Index Materials
• Cut-wire pairs and plate pairs as magnetic atoms for optical metamaterials
• Impact of the inherent periodic structure on the effective medium description of left-handed and related meta-materials

Cited by in corpus (7)

• A unifying approach to left handed material design
• Strongly birefringent cut-wire pair structure as negative index wave plates at THz frequencies
• Non-left-handed transmission and bianisotropic effect in a [pi]-shaped metallic metamaterials
• Metal-less Metamaterial for Surface Plasmon Polariton guiding and amplification
• A copper negative index metamaterial in the visible / near-infrared
• Discontinuous design of negative index metamaterials based on mode hybridization
• W-Band Pancharatnam Half Wave Plate Based on Negative Refractive Index Metamaterials