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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

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Femtosecond laser machining of gallium nitride

Kim, T. and Kim, H.S. and Hetterich, M. and Jones, D. and Girkin, J.M. and Bente, E. and Dawson, M.D. (2001) Femtosecond laser machining of gallium nitride. Materials Science and Engineering B, 82 (1-3). pp. 262-264. ISSN 0921-5107

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Ultrashort pulse laser ablation of gallium nitride (GaN) has been studied. Utilizing a 1 kHz femtosecond Ti:sapphire laser with a peak intensity of approximately 10(16) W cm(-2), we have successfully demonstrated controlled ablation of metal organic chemical vapour deposition and hydride vapour phase epitaxy grown GaN. Groove patterns 10-100 mum wide and as deep as 30 mum have been produced both in air and in a vacuum chamber and analyzed by scanning electron microscope and stylus profiling. This approach is demonstrated to be highly suitable for micromachining and controlled definition of features on a tens of micron length scale in materials such as GaN which are resistant to wet chemical etching.