Journal of Electronic Materials

, Volume 47, Issue 9, pp 4959–4963 | Cite as

Catastrophic Optical Damage of GaN-Based Diode Lasers: Sequence of Events, Damage Pattern, and Comparison with GaAs-Based Devices

  • Jens W. Tomm
  • Robert Kernke
  • Giovanna Mura
  • Massimo Vanzi
  • Martin Hempel
  • Bruno Acklin
Topical Collection: 17th Conference on Defects (DRIP XVII)
Part of the following topical collections:
  1. 17th Conference on Defects-Recognition, Imaging and Physics in Semiconductors (DRIP XVII)


Gallium-nitride-based diode lasers were intentionally damaged using single sub-μs current pulses. This approach provoked catastrophic optical damage, a known sudden degradation mechanism, which becomes evident as surface modification at the aperture, where the 450-nm laser emission leaves the waveguide of the device. Subsequently, we analyzed the related damage pattern inside the device. Knowledge about the operating conditions, degradation time, and energy introduced into the defect allows estimates of the temperature during the process (∼ 1000°C) and defect propagation velocity (110 μm/μs). Further analysis of this data allows for conclusions regarding the mechanisms that govern defect creation at the surface and defect propagation inside the device. Moreover, we compared these findings with earlier results obtained from gallium-arsenide-based devices and find similarities in the overall scenario, while the defect initialization and defect pattern are strikingly different.


Catastrophic optical damage COD GaN-based diode laser generic degradation damage pattern 


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The authors thank Dr. Anna Mogilatenko and Dr. Harald König for helpful discussions. We also thank Dr. Elodia Musu of CRS4-Cagliari for FIB sample preparation, and Dr. Vittorio Morandi and Dr. Andrea Migliori of CNR-IMM Bologna for TEM/STEM analysis.


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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  • Jens W. Tomm
    • 1
  • Robert Kernke
    • 1
  • Giovanna Mura
    • 2
  • Massimo Vanzi
    • 2
  • Martin Hempel
    • 3
  • Bruno Acklin
    • 4
  1. 1.Max-Born-Institut für Nichtlineare Optik und KurzzeitspektroskopieBerlinGermany
  2. 2.Department of Electrical and Electronic EngineeringUniversity of CagliariCagliariItaly
  3. 3.Fraunhofer IZMBerlinGermany
  4. 4.Mountain ViewUSA

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