Surface emitting laser element, surface emitting laser, surface emitting laser device, light source device, and detection apparatus

A surface emitting laser element, comprising:

• a first reflecting mirror;
• an active layer over the first reflecting mirror;
• a second reflecting mirror over the active layer;
• a multilayer film over the second reflecting mirror, the multilayer film having a center portion and a peripheral portion around the center portion in plan view in a direction perpendicular to a principal surface of the second reflecting mirror;
• a first portion where the center portion overlaps the second reflecting mirror in the plan view;
• and
• a second portion where the peripheral portion overlaps the second reflecting mirror in the plan view, wherein
• the multilayer film has a side surface including one film inclined with respect to the principal surface of the second reflecting mirror, the peripheral portion including the side surface,
• the multilayer film includes, in a thickness direction, two or more pairs of a first film having a first refractive index and a second film having a second refractive index higher than the first refractive index, and
• a first reflectivity of the first portion is greater than a second reflectivity of the second portion.