Nano-height cylindrical waveguide in GaN-based vertical-cavity surface-emitting lasers

We have proposed a novel nano-height cylindrical waveguide in blue GaN-based vertical-cavity surface-emitting lasers (VCSELs). The proposed 5 nm step height cylindrical waveguide using simple processes provides lateral optical confinement and excellent performance in terms of light output power (LOP...

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Published inApplied physics express Vol. 13; no. 8; pp. 82005 - 82008
Main Authors Kuramoto, Masaru, Kobayashi, Seiichiro, Akagi, Takanobu, Tazawa, Komei, Tanaka, Hiroki, Takeuchi, Tetsuya
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.08.2020
Subjects
GaN
laser diodes
lateral optical waveguide
VCSEL
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Summary:We have proposed a novel nano-height cylindrical waveguide in blue GaN-based vertical-cavity surface-emitting lasers (VCSELs). The proposed 5 nm step height cylindrical waveguide using simple processes provides lateral optical confinement and excellent performance in terms of light output power (LOP) and wall plug efficiency (WPE). A fabricated multi-mode VCSEL with 7 m emission diameter achieved a LOP of 23.7 mW, maximum external differential quantum efficiency of 43.6%, and WPE of 10% under continuous wave operation at 20 °C. Additionally, a single-mode VCSEL with 3.3 m emission diameter exhibited LOP of more than 5 mW and WPE of 9.9%.
Bibliography:APEX-104030.R1
ISSN:1882-0778
1882-0786
DOI:10.35848/1882-0786/aba45b