Patent ID: 11942762
Assignee: SUZHOU LEKIN SEMICONDUCTOR CO., LTD.
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 9:
10. A surface light emitting laser device comprising:
a substrate;
a first reflection layer disposed on the substrate;
an active layer disposed on the first reflection layer;
a second reflection layer disposed on the active layer and including an aperture region; and
an AlGa-based transition layer disposed between the active layer and the second reflection layer and having an Al composition graded,
wherein the aperture region includes a first insulating layer and a second insulating layer disposed on the first insulating layer,
wherein a length of the first insulating layer is longer than a length of the second insulating layer,
wherein the AlGa-based transition layer includes a first AlGa-based transition layer disposed in an upper first region of the first insulating layer and a second AlGa-based transition layer disposed below the first insulating layer,
wherein in the first AlGa-based transition layer, a composition of Al is graded in a first range of 0.12 to 0.80, and
wherein a composition of Al in the second AlGa-based transition layer is graded in a second range of 0.30 to 0.65.