Negative refractive index metamaterials refer to a situation where the effective permeability and permittivity are both negative in the same frequency window. This was initially demonstrated by Smith et al. in the microwave domain (Smith et al., 2000; Liu and Zhang, 2011; Shelby et al., 2001)...
We numerically propose a negative refractive index metamaterial structure with a unit cell composed of only one semi H-shaped element. With this structure a very high transmission of 0.65dB and a low reflection of 16.48dB can be achieved at 4.725THz, with the real part of the refractive index...
Metamaterials are artificially engineered structures that have properties, such as a negative refractive index1,2,3,4, not attainable with naturally occurring materials. Negative-index metamaterials (NIMs) were first demonstrated for microwave frequencies5,6, but it has been challenging to design NIMs ...
Using full numerical simulations we have demonstrated that NIM slabs con- sisting of Si-Ag-Si nanowire arrays have a negative refractive index between 620 and 730 nm with a FOM of ,17 at 660.3 nm. For a NIM slab made of GaP-Ag-GaP nanowire arrays of comparable size, the working range...
Metamaterial structure based on split ring resonators (SRR) is proposed in order to produce a negative refractive index. For this structure we have used a new approach, instead of applying light perpendicularly incident. We apply horizontally incident input waves. A model of SRR is used to ...
Negative refractive index can be realized originating from chiral configuration of this metamaterial. With precious tuning of rotated angle in each metallic foil pair and dielectric thickness h, different chirality parameters and negative refraction indices can be obtained. These results help to give a...
candidate Hanlyun Cho (Department of Mechanical Engineering) has developed a super lens based on a vertical hyperbolic metamaterial that exhibits a negative refractive index (negative refraction) in the entire visible domain for the first time. By using a hyperbolic metamaterial – a material that ...
A. Dionne, "A Broadband Negative Index Metamaterial at Optical Frequencies", Advanced Optical Materials, 1, 327-333 (2013)Atre A C, Garcia-Etxarri A, Alaeian H, et al. A broadband negative index metamaterial at optical frequencies. Adv Optical Mater, 2013, 1: 327-333...
sound or even thermal energy. A notable property of metamaterials is their ability to achieve a negative refractive index, which causes light to bend in the opposite direction when passing through the material. This phenomenon can be applied to create what are called “superlenses.” This phenomen...
Metamaterials (MMs) refer to artificial structures or composite materials with extraordinary physical properties that can not be found in natural materials, such as electromagnetic/acoustic cloak [1–5], zero/negative Poisson's ratio [6–10], negative refractive index [11–15], etc. To realize ...