Specular Reflection from a Rough Surface
The rough surface of a ground glass plate generally gives a diffuse reflection. However, if light from an object is incident on it at a low enough grazing angle, the rough surface behaves like an optically plane surface and causes specular reflection of the incident light, producing a reflected image of the object. A reflected image is obtained from the rough surface of a ground glass plate.
We study the photorefractive self-action of light beams within an iron-doped planar optical waveguide in lithium niobate biased by external electric field, to find the conditions for the formation of quasisteady-state screening-photovoltaic spatial solitons. Their formation is expected to take much shorter time compared with the steady-state photovoltaic solitons.