LIGHT EMITTING DEVICE AND PROJECTOR

Japanese Patent JP2022142100

A

To provide a light emitting device capable of improving a light confinement coefficient.SOLUTION: A light emitting device includes a laminate having a plurality of column-like parts. Each of the plurality of column-like parts includes: a first semiconductor layer having a first conductivity type; a second semiconductor layer having a second conductivity type different from the first conductivity type; and a light emission layer provided between the first semiconductor layer and the second semiconductor layer. The maximum diameter of the column-like parts in the first semiconductor layer is smaller than the maximum diameter of the column-like parts in the second semiconductor layer. The diameter of the column-like parts in the first semiconductor layer is smaller than the minimum diameter of the column-like parts in the second semiconductor layer at a first position of the laminate in a lamination direction, and is maximum at a second position different from the first position in the lamination direction. The refractive index of the first semiconductor layer at the first position is higher than the refractive index of the second semiconductor layer and the refractive index of the first semiconductor layer at the second position.SELECTED DRAWING: Figure 2

WO/1990/006608	METHOD FOR PRODUCING SEMI-CONDUCTOR LASERS AND LASERS OBTAINED BY SUCH METHOD
JP4017196	Distribution feedback type semiconductor laser device
JP4507489	Surface emitting semiconductor laser and its manufacturing method

AOTA MASAAKI

JP2021042110A

September 30, 2022

March 16, 2021

Click for automatic bibliography generation  

SEIKO EPSON CORP

H01S5/18; G03B21/00; G03B21/14; H01S5/20; H01S5/343

Satoshi Nakai
Hiroki Matsuoka
Masayuki Imamura

Previous Patent: Inkjet ink composition, ink set, and recording method

Next Patent: Light source device and projector