SURFACE-EMITTING LASER, SURFACE-EMITTING LASER ARRAY, LASER APPARATUS, IGNITION DEVICE AND INTERNAL COMBUSTION ENGINE

摘要

A surface-emitting laser includes a plurality of semiconductor layers; an active layer; and spacer layers, between which the active layer is held. The active layer includes a first layer including aluminum gallium indium arsenide ((Al x Ga 1-x ) y In 1-y As, where x and y are greater than or equal to zero but less than one), and a second layer including aluminum gallium indium arsenide ((Al m Ga 1-m ) n In 1-n As, where m and n are greater than or equal to zero but less than one, and at least one of m-x and n-y is not zero). The spacer layers includes aluminum gallium indium phosphide ((Al a Ga 1-a ) b In 1-b P, where a and b are greater than or equal zero but less than one). The plurality of semiconductor layers and the active layer held between the spacer layers are laminated.