Light-emitting device

A light-emitting device, comprising:

• a light emission section including a stack structure, wherein
• the stack structure includes:
• an active layer,
• a first reflector, and
• a second reflector,
• the active layer is configured to perform light emission by current injection, and
• the active layer is between the first reflector and the second reflector in a specific direction;
• a separation groove symmetrically around the light emission section,
• wherein the separation groove extends from a light emission surface of the stack structure in the specific direction;
• a current confinement layer between the light emission surface and the active layer,
• wherein the current confinement layer includes:
• an unoxidized region, and
• an annular oxidized region that surrounds the unoxidized region in
• an in-plane direction perpendicular to the specific direction;
• and
• a high resistance region in the stack structure, wherein
• the high resistance region is on an outer side of the separation groove,
• the high resistance region has an electrical resistance higher than that of the light emission section,
• the high resistance region includes an impurity element,
• a content of the impurity element has a concentration distribution in the specific direction, and
• the concentration distribution of the content of the impurity element has a peak at a depth, in the specific direction, at which the current confinement layer is in the light-emitting device.