Surface-emitting laser element, surface-emitting laser array, optical scanning device, and image forming apparatus

摘要

A surface-emitting laser element includes a substrate; a plurality of semiconductor layers laminated on the substrate, the plural semiconductor layers including a resonator structural body including an active layer and semiconductor multilayer film reflection mirrors having the resonator structural body sandwiched therebetween; an electrode provided in such a manner as to surround a emitting region on a surface of the surface-emitting laser element from which light is emitted; and a dielectric film provided in the emitting region such that a reflection ratio of a peripheral part of the emitting region is different from a reflection ratio of a center part of the emitting region. Edge portions that are near edges of the dielectric film are tilted with respect to the surface.