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NEGATIVE REFRACTIVE INDEX. "In virtually all undergraduate and graduate level texts on the subject of optics or electricity and magnetism, the refractive index is always assumed positive." https://lnkd.in/ePVzVDS View in LinkedIn

THE CUTTING EDGE. "A new four-fold symmetry double-layer chiral structure is designed, of which the operating wavelength band is in the optical region." https://lnkd.in/e63vepq View in LinkedIn

VOIDS IN THE SPECTRUM. "These artificially structured composites, known as metamaterials, have the potential to fill critical voids in the electromagnetic spectrum where material response is limited and enable the construction of novel devices." https://lnkd.in/ePVzVDS View in LinkedIn

TECHNICAL ADVANCE. "Our approach is a significant advance for scalable nanofabrication of optical 3D photonic crystals and metamaterials that will find applications in the coating of large arbitrarily-curved surfaces to provide optical filters and switches, sensors, cloaking, light harvesting, and enhanced photochemical devices." https://lnkd.in/erZViDf View in LinkedIn

VOIDS IN THE SPECTRUM. "Engineered materials composed of designed inclusions can exhibit exotic and unique electromagnetic properties not inherent in the individual constituent components." https://lnkd.in/ePVzVDS View in LinkedIn

3D PHOTONIC CRYSTALS. "Controlling electromagnetic (EM) waves in three dimensions using photonic crystals has stimulated research over several decades. In such structures, the periodic arrangement of dielectric inclusions forbids light propagation inside the sample, opening up energy band gaps in the photonic dispersion." https://lnkd.in/erZViDf View in LinkedIn

PHOTONIC CRYSTALS (AGAIN). "In 2000, it was shown theoretically that several photonic crystal configurations could exhibit the same types of optical phenomena predicted for negative index materials, including negative refraction and imaging by a planar surface." https://lnkd.in/ewjS99N View in LinkedIn

NEW PARADIGM. "Having established the reality of negative refraction, we are now free to investigate other phenomena related to negative index materials. We quickly find that some of the most long-held notions related to waves and optics must be rethought!" https://lnkd.in/ewjS99N View in LinkedIn

CHALLENGED AND NAILED. "The theoretical foundation of negative refraction was challenged in 2002. The theoretical issue was subsequently addressed by several authors, who concluded that, indeed, time-varying signals could also be negative refracted." https://lnkd.in/ewjS99N View in LinkedIn

CHALLENGED AND NAILED. "In 2001, a Snell’s law experiment was performed on a wedge-shaped metamaterial designed to have a negative index of refraction at microwave frequencies." https://lnkd.in/ewjS99N View in LinkedIn