| abstract |
Disclosed is a surface emitting semiconductor laserndevice capable of controlling transverse modes. A layernstructure of a semiconductor material having a light-emittingnlayer provided between an upper reflector layer structure andna lower reflector layer structure is formed on a substrate, anpart of the surface of the opening portion located above thenupper reflector layer structure is coated with a transparentnlayer transparent to the oscillation wavelength of a lasernbeam such as a dielectric film, thereby forming a light-emergingnwindow for the laser beam. The transverse modes ofnthe laser beam can be controlled by changing the planar shapenof the light-emerging window. |