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Optimization of Carrier Distributions in Periodic Gain Structures toward Blue VCSELs

Published online by Cambridge University Press:  19 January 2015

Kenjo Matsui ,
Kosuke Horikawa ,
Yugo Kozuka ,
Kazuki Ikeyama ,
Daisuke Komori ,
Tetsuya Takeuchi ,
Satoshi Kamiyama ,
Motoaki Iwaya  and
Isamu Akasaki
Kenjo Matsui
Affiliation:
Faculty of Science and Technology, Meijo University, Nagoya, 468-8502, Japan.
Kosuke Horikawa
Affiliation:
Faculty of Science and Technology, Meijo University, Nagoya, 468-8502, Japan.
Yugo Kozuka
Affiliation:
Faculty of Science and Technology, Meijo University, Nagoya, 468-8502, Japan.
Kazuki Ikeyama
Affiliation:
Faculty of Science and Technology, Meijo University, Nagoya, 468-8502, Japan.
Daisuke Komori
Affiliation:
Faculty of Science and Technology, Meijo University, Nagoya, 468-8502, Japan.
Tetsuya Takeuchi
Affiliation:
Faculty of Science and Technology, Meijo University, Nagoya, 468-8502, Japan.
Satoshi Kamiyama
Affiliation:
Faculty of Science and Technology, Meijo University, Nagoya, 468-8502, Japan.
Motoaki Iwaya
Affiliation:
Faculty of Science and Technology, Meijo University, Nagoya, 468-8502, Japan.
Isamu Akasaki
Affiliation:
Faculty of Science and Technology, Meijo University, Nagoya, 468-8502, Japan. Graduate School of Engineering and Akasaki Research Center, Nagoya University, Nagoya, 464-8603, Japan.
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Abstract

We have fabricated light emitting diodes (LEDs) in which two active regions separated with a Mg-doped GaN intermediate layer were placed in a single pn junction toward periodic gain structures (PGS) for blue vertical-cavity surface emitting lasers (VCSELs). By current density dependence on a emission intensity ratio from two different active regions, we obtained a very stable emission intensity ratio over 1 kA/cm2. This result is also confirmed with the simulation result. Furthermore, we found that the difference of emission wavelength affect the carrier injection and the emission intensity ratio. On the basis of this result, the optimized well-balanced Mg concentration in the intermediate layer for the two identical active regions were estimated approximately 5 x 1018 cm-3.

Keywords

nitrideoptical propertiesdevices
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1736: Symposium T – Wide-Bandgap Materials for Solid-State Lighting and Power Electronics , 2014 , mrsf14-1736-t04-08
Copyright
Copyright © Materials Research Society 2014 

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References

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