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Original Paper
Defects in degraded GaN-based laser diodes
Article first published online: 7 NOV 2003
DOI: 10.1002/pssa.200303322
Copyright © 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Tomiya, S., Goto, S., Takeya, M. and Ikeda, M. (2003), Defects in degraded GaN-based laser diodes. phys. stat. sol. (a), 200: 139–142. doi: 10.1002/pssa.200303322
Publication History
- Issue published online: 7 NOV 2003
- Article first published online: 7 NOV 2003
- Manuscript Accepted: 24 JUN 2003
- Manuscript Received: 20 APR 2003
- Abstract
- References
- Cited By
Keywords:
- 42.55.Px;
- 68.55.Ln;
- 81.05.Ea
Abstract
We investigate degraded GaN-based laser diodes (LDs) fabricated on epitaxial lateral overgrown (ELO) GaN layers using transmission electron microscopy. The dislocation density in the wing region of the ELO is of the order of 106/cm2 and there are approximately ten threading dislocations in the laser stripe. Neither dislocation multiplication from the threading dislocations nor any structural changes of the threading dislocations were observed in the devices, which were degraded within approximately one hundred hours under 30 mW continuous operation at 25 °C. We can, therefore, conclude that degradation in GaN-based LDs is not responsible for the recombination enhanced dislocation motion that is usually observed in zincblende structure-based LDs. (© 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)