Abstract
Photoluminescence (PL) mapping was utilized to investigate damage in β-Ga2O3 epilayers induced by 1064 nm laser pulses. The intensity and position of the intrinsic UV band were determined and plotted as a false-color image. Two types of damage were identified: circular damage and damage cracks. Circular damage shows lower UV PL intensity than the surrounding material with color centers in a “halo” around the damaged region. Damage cracks are aligned with the a and c axes and show higher PL intensity than undamaged material. Defects in the as-grown material were revealed by shifts in the UV band energy.
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Funding
This work was performed under the auspices of the U.S. DOE by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344, and partially supported by LLNL LDRD funding under project number 22-SI-003. M.D.M. acknowledges support by the Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering under Award No. DE-FG02-07ER46386.
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All authors contributed to the study conception and design. Semiconductor growth was performed by Arkka Bhattacharyya and Sriram Krishnamoorthy. Data collection and analysis were performed by Jesse Huso, Matthew D. McCluskey, and Clint D. Frye. The first draft of the manuscript was written by Matthew McCluskey and all authors contributed to the manuscript. All authors read and approved the final manuscript.
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J.H. is an employee of Klar Scientific and M.D.M. owns equity in the company.
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Huso, J., McCluskey, M.D., McCloy, J.S. et al. Photoluminescence mapping of laser-damaged β-Ga2O3. MRS Communications (2024). https://doi.org/10.1557/s43579-024-00564-1
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DOI: https://doi.org/10.1557/s43579-024-00564-1