Mechanism and effects of surface morphology on absorption characteristics in ultrashort pulse laser processing of sapphire

• Main Authors: Lye, Celescia Siew Mun, Wang, Z. K., Lam, Yee Cheong
• Other Authors: School of Mechanical and Aerospace Engineering
• Format: Article
• Language: English
• Published: 2021
• Subjects: Engineering::Mechanical engineering; Total Internal Reflection; Surface Morphology
• Online Access: https://hdl.handle.net/10356/146198
• Institution: Nanyang Technological University

For ultrashort pulse laser processing of a sapphire wafer, nonlinear absorption of laser energy at sufficiently high laser intensity is essential. This study found that in ultrashort pulse laser processing of a sapphire wafer, its surface morphology can have a significant effect on nonlinear absorpt...