公开(公告)号：EP4311043A1

公开(公告)日：2024-01-24

申请号：EP22771148.8

申请日：2022-03-04

申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD. ,  Kyoto University

发明人： FUJIWARA, Naoki ,  KONO, Naoya ,  FURUYA, Akira ,  ITO, Yuki ,  NODA, Susumu ,  INOUE, Takuya ,  ISHIZAKI, Kenji

IPC分类号： H01S5/11 ,  H01S5/185 ,  H01S5/20

摘要： A photonic crystal surface-emitting laser includes a light emitting region from which light is emitted in a direction crossing an in-plane direction, and a current blocking region that is adjacent to the light emitting region in the in-plane direction and in which current is less likely to flow than in the light emitting region. The light emitting region and the current blocking region each include a photonic crystal layer. The photonic crystal layer has a first region and second regions periodically arranged in the in-plane direction in the first region. A refractive index of each of the second regions is different from a refractive index of the first region. The light emitting region includes a first semiconductor layer having a first conductivity type, an active layer having an optical gain, and a second semiconductor layer having a second conductivity type. The first semiconductor layer, the active layer, and the second semiconductor layer are sequentially stacked on top of one another in an emission direction of the light.

公开(公告)号：EP4266516A1

公开(公告)日：2023-10-25

申请号：EP21906170.2

申请日：2021-10-29

申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD. ,  Kyoto University

发明人： KONO, Naoya ,  ITO, Yuki ,  FUJIWARA, Naoki ,  NODA, Susumu ,  INOUE, Takuya ,  DE ZOYSA, Menaka ,  ISHIZAKI, Kenji

IPC分类号： H01S5/183 ,  H01S5/11

摘要： A photonic-crystal surface emitting laser includes a first semiconductor layer, a photonic crystal layer having a refractive index higher than a refractive index of the first semiconductor layer and provided on the first semiconductor layer, and an active layer provided opposite to the first semiconductor layer with respect to the photonic crystal layer. The photonic crystal layer has a first region and a plurality of second regions each having a refractive index different from a refractive index of the first region and periodically disposed in the first region in a plane of the photonic crystal layer. The second regions extend from the photonic crystal layer to the first semiconductor layer.