Surface morphology of cerium oxide ablated by femtosecond-pulsed laser with varying target scanning speeds

Authors

  • Bienica Yzabelle Gapasin Tinte National Institute of Physics, University of the Philippines Diliman
  • Joseph De Mesa National Institute of Physics, University of the Philippines Diliman
  • Angelo Rillera National Institute of Physics, University of the Philippines Diliman
  • Roland Sarmago National Institute of Physics, University of the Philippines Diliman
  • Wilson Garcia National Institute of Physics, University of the Philippines Diliman

Abstract

An 800 nm femtosecond pulsed laser operating at 80~MHz pulse repetition rate was used to ablate different areas of a pelleted CeO2 target with different scanning speeds in 25-30 mTorr vacuum. After which, the target was examined using surface electron microscopy to observe its surface morphology. The grooves formed along the laser path confirm successful material removal and surface modification. SEM image analysis shows the grooves width to be narrower for faster target rotation speeds. Qualitatively, a faster rotation produces grooves that appear to be melted indicating the onset of ablation. These can be explained by the reduced heat accumulation effect in the material as the target rotates faster and the laser pulses are more spatially displaced at the target surface, leading to a less effective ablation in terms of area ablated.

Published

2020-10-19

How to Cite

[1]
BYG Tinte, J De Mesa, A Rillera, R Sarmago, and W Garcia, Surface morphology of cerium oxide ablated by femtosecond-pulsed laser with varying target scanning speeds, Proceedings of the Samahang Pisika ng Pilipinas 38, SPP-2020-3A-09 (2020). URL: https://proceedings.spp-online.org/article/view/SPP-2020-3A-09.

Issue

Section

Condensed Matter and Materials Science (Short Presentations)