Few cycle pulse laser induced damage studies of gallium oxide and gallium nitride (Conference Presentation)

Brandon Harris

doi:10.1117/12.2538819

26 November 2019 Few cycle pulse laser induced damage studies of gallium oxide and gallium nitride (Conference Presentation)

Brandon Harris

Author Affiliations +

Proceedings Volume 11173, Laser-induced Damage in Optical Materials 2019; 111730F (2019) https://doi.org/10.1117/12.2538819
Event: SPIE Laser Damage, 2019, Broomfield (Boulder area), Colorado, United States

Abstract

The laser damage thresholds for gallium nitride and gallium oxide were found after exposing each sample to a femtosecond laser pulse. Threshold fluences were determined for both single pulse and multi pulse exposures. To accurately characterize the excited carrier density criteria in which visible laser damage occurs, we simulated carrier excitation dynamics for the entire laser pulse as it interacts with the target using the Keldysh model. From this a dynamic model of the conduction band carrier concentration was determined. For the measured single shot threshold fluences, the plasma critical density criteria for damage was met.

Conference Presentation

Citation Download Citation

Brandon Harris "Few cycle pulse laser induced damage studies of gallium oxide and gallium nitride (Conference Presentation)", Proc. SPIE 11173, Laser-induced Damage in Optical Materials 2019, 111730F (26 November 2019); https://doi.org/10.1117/12.2538819

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