Surface emitting laser

Patent metadata

Field	Value
Publication number	US-2025266662-A1
Application number	US-202218293048-A
Country	US
Kind code	A1
Filing date	Feb 18, 2022
Priority date	Sep 13, 2021
Publication date	Aug 21, 2025
Grant date	—

Abstract

A surface emitting laser having an isotropically selectively oxidized oxidation confinement layer is provided.
The surface emitting laser according to the present technology includes: a first multilayer film reflector; a second multilayer film reflector; an active layer disposed between the first and second multilayer film reflectors; and an oxidation confinement layer disposed between the second multilayer film reflector and the resonator and having a non-oxidized region and an oxidized region, in which the oxidation confinement layer includes an oxidation adjustment structure. According to the surface emitting laser according to the present technology, it is possible to provide a surface emitting laser having an isotropically selectively oxidized oxidation confinement layer.

First claim

1 . A surface emitting laser comprising:
a first multilayer film reflector; a second multilayer film reflector; an active layer disposed between the first and second multilayer film reflectors; and an oxidation confinement layer disposed between the second multilayer film reflector and the active layer and having a non-oxidized region and an oxidized region, wherein the oxidation confinement layer includes an oxidation adjustment structure.

2 . The surface emitting laser according to claim 1 , further comprising
a semiconductor layer protruding from a side of the active layer to a side of the second multilayer film reflector or recessed from the side of the second multilayer film reflector to the side of the active layer, wherein the oxidation confinement layer covers the semiconductor layer from the side of the second multilayer film reflector, and the oxidation adjustment structure includes an oxidation progression suppressing portion.

3 . The surface emitting laser according to claim 2 , wherein the oxidation progression suppressing portion has a thin film portion and/or a cutoff portion.

4 . The surface emitting laser according to claim 2 , wherein the oxidation progression suppressing portion exists corresponding to an entire circumference of the non-oxidized region.

5 . The surface emitting laser according to claim 2 , wherein the oxidation progression suppressing portion is provided on at least a part of a side surface of the semiconductor layer.

6 . The surface emitting laser according to claim 2 , wherein a longitudinal cross section of the semiconductor layer is not rectangular.

7 . The surface emitting laser according to claim 2 , wherein the semiconductor layer does not have a {111} A plane on a surface thereof.

8 . The surface emitting laser according to claim 7 , wherein the semiconductor layer has a polygonal horizontal cross section.

9 . The surface emitting laser according to claim 2 , wherein the oxidation confinement layer does not have a thick film portion.

10 . The surface emitting laser according to claim 2 , wherein a boundary between the non-oxidized region and the oxidized region exists in the oxidation progress suppressing portion.

11 . The surface emitting laser according to claim 2 , wherein the semiconductor layer has a forward tapered longitudinal cross section, and does not have a plane perpendicular to an arbitrary crystal orientation within an angle range of ±22.5° from a direction in a plane including a direction and a direction.

12 . The surface emitting laser according to claim 2 , wherein the semiconductor layer has a reverse tapered longitudinal cross section, and does not have a plane perpendicular to an arbitrary crystal orientation within an angle range of ±22.5° from a [0-11] direction in a plane including a direction and a direction.

13 . The surface emitting laser according to claim 2 , wherein the oxidation confinement layer has a thin film portion and a thick film portion in a predetermined longitudinal cross section.

14 . The surface emitting laser according to claim 2 , wherein the semiconductor layer has a {111} A plane on a surface thereof, and a longitudinal cross section thereof has a forward tapered shape and a reverse tapered shape.

15 . The surface emitting laser according to claim 14 , wherein the oxidation confinement layer has a boundary between the non-oxidized region and the oxidized region at a position corresponding to a boundary between the forward tapered shape and the reverse tapered shape of the semiconductor layer.

16 . The surface emitting laser according to claim 1 , wherein the oxidation adjustment structure has a route-around portion.

17 . The surface emitting laser according to claim 16 , wherein a boundary between the non-oxidized region and the oxidized region exists in the route-around portion.

18 . The surface emitting laser according to claim 16 , further comprising
a semiconductor layer protruding from a side of the active layer to a side of the second multilayer film reflector or recessed from the side of the second multilayer film reflector to the side of the active layer, wherein the oxidation confinement layer covers the semiconductor layer from the side of the second multilayer film reflector, and at least a part of the route-around portion extends along the semiconductor layer.

19 . The surface emitting laser according to claim 18 , wherein the semiconductor layer has an eaves shape.

20 . The surface emitting laser according to claim 16 , further comprising
a semiconductor layer disposed between the second multilayer film reflector and the active layer, wherein a groove is provided on a surface of the semiconductor layer on the side of the second multilayer film reflector, and at least a part of the route-around portion extends along the groove.

Assignees

• Sony Group Corp

Inventors

• Matou Tatsuya
• Watanabe Hideki
• Koda Rintaro

Classifications

• H01S5/227

  Buried mesa structure {; Striped active layer} · CPC title

• H01S5/18361

  Structure of the reflectors, e.g. hybrid mirrors · CPC title

• H01S5/1835

  Non-circular mesa · CPC title

• H01S5/18311 Primary

  using selective oxidation · CPC title

• G01S7/4814

  of transmitters alone · CPC title