Optical negative-index bulk metamaterials consisting of 2D perforated metal-dielectric stacks

Optical negative-index bulk metamaterials consisting of 2D perforated metal-dielectric stacks.

Numerical simulations of a near-infrared negative-index metamaterial (NIM) slab consisting of multiple layers of perforated metal-dielectric stacks exhibiting a small imaginary part of the index over the wavelength range for negative refraction are presented. A consistent effective index is obtained using both scattering matrix and modal analysis approaches. Backward phase propagation is verifi...

Optical negative-index metamaterials

Demonstration of metal–dielectric negative-index metamaterials with improved performance at optical frequencies

We experimentally demonstrate a comparatively low-loss negative-index metamaterial with the magnitude of the real part of the index comparable with the imaginary part. Over 40% transmission is achieved in the negative-index region by structural adjustment of the impedance matching between the metamaterial and the air–substrate claddings. This structure has the potential of achieving high transm...

Connected bulk negative index photonic metamaterials.

We show the designs of bulk one- and two-dimensionally isotropic photonic negative index metamaterials working around telecom wavelengths. The designed structures are inherently connected, which makes fabrication by direct laser writing and chemical vapor deposition or other techniques possible.

Negative index of refraction in optical metamaterials.

A double-periodic array of pairs of parallel gold nanorods is shown to have a negative refractive index in the optical range. Such behavior results from the plasmon resonance in the pairs of nanorods for both the electric and the magnetic components of light. The refractive index is retrieved from direct phase and amplitude measurements for transmission and reflection, which are all in excellen...