New technique shows promise for dramatic miniaturization of metamaterials and negative index of refraction of -700, one hundred times larger than before
In a vacuum, light travels so fast that it would circle the Earth more than seven times within the blink of an eye. When light propagates through matter, however, it slows by a factor typically less than 5. This factor, called the refractive index, is positive in naturally occurring materials, and it causes light to …