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Demonstration of ultraviolet-B AlGaN-based laser diode operation with a peak light output power of 150 mW by improving injection efficiency through polarization charge modulation

Authors :
Ryosuke Kondo
Ayumu Yabutani
Tomoya Omori
Kazuki Yamada
Eri Matsubara
Ryota Hasegawa
Toma Nishibayashi
Sho Iwayama
Tetsuya Takeuchi
Satoshi Kamiyama
Hideto Miyake
Motoaki Iwaya
Source :
Applied Physics Letters. 121:253501
Publication Year :
2022
Publisher :
AIP Publishing, 2022.

Abstract

In this study, AlGaN-based ultraviolet-B band laser diodes with 150-mW peak output power in pulsed operation were demonstrated at room temperature. The oscillation wavelength, differential quantum efficiency, and slope efficiency of a laser diode were 300 nm, 3.6%, and 0.15 W/A, respectively. These results were obtained by increasing the injection efficiency and decreasing the positive fixed polarization charge formed at the interface between a p-side waveguide layer and an electron blocking layer when polarization doping is formed in a p-AlGaN cladding layer.

Details

ISSN :
10773118 and 00036951
Volume :
121
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........927dfe102e461a7a9a4ce718f6fb6628