Повышение фокусирующих свойств градиентных периодических структур

Abstract

Gradient periodic structures have a change in parameters along their surface. The wave front changes its configuration when interacting with such structure. A flat gradient periodic structure can have simultaneously the properties of concave mirror and focusing lens. This combination of properties is ideal for output mirrors of terahertz lasers. Increasing of focusing properties of such structures will expand scope of its application.