Patent ID: 8295318
Filing Date: 2012-10-23
Classification: H01S

Abstract:
1. A vertical cavity surface emitting laser comprising: a substrate; a first semiconductor multilayer film reflector of a first conductivity type, the first semiconductor multilayer film reflector being formed on the substrate; an active region that is formed on the first semiconductor multilayer film reflector; a second semiconductor multilayer film reflector of a second conductivity type that is a conductivity type different from the first conductivity type, the second semiconductor multilayer film reflector being formed on the active region, and the second semiconductor multilayer film reflector including a first surface facing the active region and a second surface opposite to the first surface; an electrode which is formed on the second surface of the second semiconductor multilayer film reflector, and in which a light emitting aperture from which light is emitted is formed; a solid light absorption layer that is formed on the second surface of the second semiconductor multilayer film reflector in at least a peripheral region of the light emitting aperture of the electrode, and that absorbs light having an emission wavelength; and a light transmission layer that is composed of a material which the light having the emission wavelength is able to pass through, and that is formed on the second surface of the second semiconductor multilayer film reflector in a central region of the light emitting aperture of the electrode, wherein a thickness of the light absorption layer and a thickness of the light transmission layer are selected so that a phase of light which emanates from the light absorption layer and a phase of light which emanates from the light transmission layer are adjusted.