Optical semiconductor radiation source - has hilly geometric shaped outer surface with PN junction in or near hill

摘要

Optical semiconductor source of radiation with one or both regions having a hilly surface. The device has a pn junction between two regions of different type conductivity. In this device the total reflection losses are considerably reduced and maximum use is made of the material. The hilly outer surface can be of different geometric shapes, such as triangular, pyramid or cone shaped. In the case of the triangle, the apex angle is approximately twice that which will produce total internal reflection. The pn junction emitting the optical radiation is located in or near the hilly surface.