Negative refraction in semiconductor metamaterials pdf

Negative refraction in semiconductor metamaterials. An optical metamaterial is a composite in which subwavelength features, rather than the constituent materials, control the macroscopic electromagnetic. Threedimensional 3d optical metamaterials have come into focus recently, including the realization of negative refraction by using layered semiconductor metamaterials and a. Here, we demonstrate a comparatively lowloss, threedimensional, all semiconductor metamaterial that exhibits negative refraction for all incidence angles.

Realization of broadband negative refraction in visible. Letters negative refraction in semiconductor metamaterials. Download negative refraction metamaterials download. Index termslefthanded materials, metamaterials, nanopar do not show the full. Gmachl negative refraction in semiconductor metamaterials, nat. Here, we demonstrate a comparatively lowloss, threedimensional, all semiconductor metamaterial that exhibits negative refraction for all incidence angles in the longwave infrared region and. Negative refractive index metamaterials nrm are artificial composites, characteri zed by subwavelength features and negative effective value of re fractive index 2, 3. Applying semiconductor nanocrystals as a gain material could be an. Isotropic, highlydoped materials, with an electric resonance at the same wavelength do. Negative refraction in semiconductor metamaterials a. Letters negative refraction in semiconductor metamaterials anthony j.

Negative refractive index metamaterials ucsd university of. The entire structure is placed in a strong external magnetic field, which facilitates the attainment of sufficient population. Allangle negative refraction and imaging in a bulk medium made of. We report on a novel class of semiconductor metamaterials that employ a strongly anisotropic dielectric function to achieve negative refraction in the midinfrared region of. The semiconductor based metamaterial does not yield a negative refractive index, but rather exhibits negative refraction similar to what has been achieved in photonic crystals 5. Supplementary information for negative refraction in.

Pdf negative refraction in semiconductor metamaterials. Hyperbolic metamaterials hmms show distinctive characteristics such as negative refraction 16,17, subwavelength imaging 18,19,20, confining the electromagnetic field 21, and thermal emission 22,23. This work has revealed the potential of srrsemiconductor hybrid structures to. Negative refraction in semiconductor metamaterials based. Index terms left handed materials, metamaterials, nanoparticle. Optical negativeindex metamaterials purdue engineering. We have considered the realization of metamaterials based on semiconductor quantum nanostructures, in particular, with the structural arrangement as in quantum cascade laser qcl designed to achieve optical gain in the midinfrared and terahertz part of the spectrum.