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Comparison of Lasing Characteristics of GaInNAs Quantum Dot Lasers and GaInNAs Quantum Well Lasers

Published online by Cambridge University Press:  01 February 2011

Chongyang Y. Liu
Affiliation:
[email protected], Nanyang Technological University, School of Electrical and Electronic Engineering, S1-B2C-20,, Nanyang Avenue, Singapore, Singapore, Singapore, 639798, Singapore
Soon Fatt Yoon
Affiliation:
[email protected], Nanyang Technological University, School of Electrical and Electronic Engineering, Singapore
Zhongzhe Z. Sun
Affiliation:
[email protected], Nanyang Technological University, School of Electrical and Electronic Engineering, Singapore
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Abstract

Self-assembled GaInNAs/GaAsN single layer quantum dot (QD) lasers grown using solid source molecular beam epitaxy have been fabricated and characterized. Temperature-dependent measurements have been carried out on the GaInNAs QD lasers. High-temperature operation up to 65°C was demonstrated from an unbonded GaInNAs QD laser (50 × 1060 μm2), with high characteristic temperature (T0) of 79.4 K in the temperature range of 10-60°C. For comparison, temperature-dependent operation has also been studied on the GaInNAs single quantum well (SQW) lasers. Unlike the relation between the cavity length and T0 in GaInNAs SQW lasers, longer-cavity GaInNAs QD laser (50 × 1700 μm2) showed lower T0 of 65.1 K, which is presumably believed due to the nonuniformity of the GaInNAs QD layer.

Type
Research Article
Copyright
Copyright © Materials Research Society 2006

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References

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