Light emitting element, light emitting element array, light emitting component, optical device, and optical measurement apparatus

Patent metadata

Field	Value
Publication number	US-2023307893-A1
Application number	US-202217938920-A
Country	US
Kind code	A1
Filing date	Sep 6, 2022
Priority date	Mar 28, 2022
Publication date	Sep 28, 2023
Grant date	—

Abstract

A light emitting element includes: a light emitting unit that has multiple semiconductor layers laminated, the light emitting unit having a length from a center of the light emitting unit to an end portion in a first direction shorter than a length from the center to an end portion in a second direction intersecting the first direction, in plan view; and a connection part that extends from the light emitting unit in the first direction and connects the light emitting unit to another semiconductor layer.

First claim

What is claimed is:

1 . A light emitting element comprising:
a light emitting unit that has a plurality of semiconductor layers laminated, the light emitting unit having a length from a center of the light emitting unit to an end portion in a first direction shorter than a length from the center to an end portion in a second direction intersecting the first direction, in plan view; and a connection part that extends from the light emitting unit in the first direction and connects the light emitting unit to another semiconductor layer.

2 . The light emitting element according to claim 1 ,
wherein the light emitting unit is line-symmetric with a straight line passing through the center as an axis of symmetry in plan view.

3 . The light emitting element according to claim 2 ,
wherein the axis of symmetry is along the first direction or the second direction.

4 . The light emitting element according to claim 1 , wherein
assuming that a length of the connection part in the second direction is X, a length of the light emitting unit passing through the center in the second direction is Y, a length of the light emitting unit passing through the center in the first direction is Z, and a length of an unoxidized region in the first direction in a current constriction layer among the plurality of semiconductor layers is A, the length of the light emitting unit passing through the center in the second direction is defined by Y=Z+X×N (0.1≤N≤0.9)×Z/(Z−A).

5 . The light emitting element according to claim 2 , wherein
assuming that a length of the connection part in the second direction is X, a length of the light emitting unit passing through the center in the second direction is Y, a length of the light emitting unit passing through the center in the first direction is Z, and a length of an unoxidized region in the first direction in a current constriction layer among the plurality of semiconductor layers is A, the length of the light emitting unit passing through the center in the second direction is defined by Y=Z+X×N (0.1≤N≤0.9)×Z/(Z−A).

6 . The light emitting element according to claim 3 , wherein
assuming that a length of the connection part in the second direction is X, a length of the light emitting unit passing through the center in the second direction is Y, a length of the light emitting unit passing through the center in the first direction is Z, and a length of an unoxidized region in the first direction in a current constriction layer among the plurality of semiconductor layers is A, the length of the light emitting unit passing through the center in the second direction is defined by Y=Z+X×N (0.1≤N≤0.9)×Z/(Z−A).

7 . A light emitting element array comprising a plurality of light emitting elements according to claim 1 ,
wherein a plurality of light emitting element groups each having the plurality of the light emitting elements are arranged, and in the light emitting element groups, the plurality of the light emitting elements are connected to each other through the connection part.

8 . A light emitting element array comprising a plurality of light emitting elements according to claim 2 ,
wherein a plurality of light emitting element groups each having the plurality of the light emitting elements are arranged, and in the light emitting element groups, the plurality of the light emitting elements are connected to each other through the connection part.

9 . A light emitting element array comprising a plurality of light emitting elements according to claim 3 ,
wherein a plurality of light emitting element groups each having the plurality of the light emitting elements are arranged, and in the light emitting element groups, the plurality of the light emitting elements are connected to each other through the connection part.

10 . A light emitting element array comprising a plurality of light emitting elements according to claim 4 ,
wherein a plurality of light emitting element groups each having the plurality of the light emitting elements are arranged, and in the light emitting element groups, the plurality of the light emitting elements are connected to each other through the connection part.

11 . A light emitting element array comprising a plurality of light emitting elements according to claim 5 ,
wherein a plurality of light emitting element groups each having the plurality of the light emitting elements are arranged, and in the light emitting element groups, the plurality of the light emitting elements are connected to each other through the connection part.

12 . A light emitting element array comprising a plurality of light emitting elements according to claim 6 ,
wherein a plurality of light emitting element groups each having the plurality of the light emitting elements are arranged, and in the light emitting element groups, the plurality of the light emitting elements are connected to each other through the connection part.

13 . The light emitting element array according to claim 7 ,
wherein a length from the center of one light emitting element in one light emitting element group of the plurality of light emitting element groups to the center of the light emitting element adjacent to the one light emitting element is longer than a length from the center of the one light emitting element to the center of the light emitting element adjacent to the one light emitting element in another light emitting element group adjacent to the one light emitting element group.

14 . The light emitting element array according to claim 8 ,
wherein a length from the center of one light emitting element in one light emitting element group of the plurality of light emitting element groups to the center of the light emitting element adjacent to the one light emitting element is longer than a length from the center of the one light emitting element to the center of the light emitting element adjacent to the one light emitting element in another light emitting element group adjacent to the one light emitting element group.

15 . The light emitting element array according to claim 9 ,
wherein a length from the center of one light emitting element in one light emitting element group of the plurality of light emitting element groups to the center of the light emitting element adjacent to the one light emitting element is longer than a length from the center of the one light emitting element to the center of the light emitting element adjacent to the one light emitting element in another light emitting element group adjacent to the one light emitting element group.

16 . The light emitting element array according to claim 10 ,
wherein a length from the center of one light emitting element in one light emitting element group of the plurality of light emitting element groups to the center of the light emitting element adjacent to the one light emitting element is longer than a length from the center of the one light emitting element to the center of the light emitting element adjacent to the one light emitting element in another light emitting element group adjacent to the one light emitting element group.

17 . The light emitting element array according to claim 11 ,
wherein a length from the center of one light emitting element in one light emitting element group of the plurality of light emitting element groups to the center of the light emitting element adjacent to the one light emitting element is longer than a length from the center of the one light emitting element to the center of the light emitting element adjacent to the one l

Assignees

• Fujifilm Business Innovation Corp

Inventors

• Kondo Takashi
• Hayakawa Junichiro
• Sakita Tomoaki
• Higuchi Takafumi
• Takeyama Kei

Classifications

• H01S5/042

  Electrical excitation {; Circuits therefor (monolithically integrated laser drive components H01S5/0261)} · CPC title

• H01S5/0261

  Non-optical elements, e.g. laser driver components, heaters (H01S5/0265 takes precedence) · CPC title

• G01S7/484

  Transmitters · CPC title

• H01S5/0262 Primary

  Photo-diodes, e.g. transceiver devices, bidirectional devices (H01S5/0265 takes precedence) · CPC title

• H01S5/423 Primary

  having a vertical cavity · CPC title