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Optical waves in crystals Yariv A., Yeh P.
Publisher: Wiley

If one wave is going up and interacts with another wave that's going down, they cancel each other and the light has zero intensity. Of course Eve could insert her own non-linear crystal along the path and read the infomation. To exploit THz-wave region, nonlinear optical effects and various optical technology are utilized. Optical information processing of the future is associated with a new generation of compact nanoscale optical devices operating entirely with light. Here, a large magnetic field interacts with a crystal (i.e. (Phys.org) —Researchers have demonstrated a method for 'temporal cloaking' of optical communications, representing a potential tool to thwart would-be eavesdroppers and improve security for telecommunications. This Demonstration shows the effect of the optical element on the polarization of light. In optics, one-way travel for photons is typically created by using what's known as Faraday rotation. Wave plates and linear polarizers are common optical elements that alter the polarization of light passing through them. This effect can occur only if the structure of the material is anisotropic, so that the material's optical properties are not the same in all directions.