Negative Refraction Boron Nitride

Refractive index is a value that describes the ratio of the speed of light when it enters into a material with different optical density. This speed change causes the light to bend and the refractive index is also the ratio of the angles forming this bend. Generally light bends towards the normal when entering glass from air and the inverse for the inverse. But some materials have a negative refractive index and light entering them almost looks like it has been reflected off an unseen boundary. In a way it has; and this reflection causes a lot of energy to be lost as the light moves through the material. But a new material that uses boron nitride in an hexagonal lattice with another layer of graphene which also shares this hexagonal shape to form a multilayer material which a higher optical conductivity then any other of its type. This allows for less reflection and greater transmission of light through the substance with the added ability of being able to change various optical values for the material by only chemically editing the graphene. Such research gets physicists one step closer to creating  the perfect lens, a theoretically possible but realistically impractical device.


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