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Radar InvisibilityBarium Titanate metamaterials
Quasicrystalline metamaterialsSince ordinary left-handed metamaterials have a limit to how small we can make them, scientists have been looking for other ways. The answer to this question lies in nanophotonics, and in a new type of material called "quasicrystals". Nanophotonics are now being recognized as a special branch of optics, in much the same way as nanoelectronics form a special branch of electronics. Some of the technological problems that had appeared at the time of the first studies on photonic crystals, are currently in the process of being solved. However, it should be stressed that future development and applications of photonic crystals are definitively dependent on the degree of accuracy which can be achieved in the fabrication of micro- and nanostructures, and thus on the overall dimensions of the corresponding devices. One of the most striking illustrations of the fruitfulness of research on metallo-dielectric photonic crystals is probably the development of the so-called metamaterials, which are expected to provide a new approach towards negative refraction, through the simultaneous control of the effective permittivity and the effective permeability. Since metamaterials are dependent upon the structure of the material rather than the properties of the atoms that make up it's composition, it is possible to build photonic metamaterials using packed nanospheres. Recently major breakthroughs have occurred in Nonlinear Liquid Crystal Nano-Metamaterials which use nanosphere- and nanoshell-doped liquid crystals can produce metamaterials with a tunable refractive index! 21st Century Scientific Research ContinuesBest Sources on Invisibility Science
These sources are courtesy of Professor Graeme Milton:
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Barium Titanate was actually one of the first of a new class of materials called