Nanosecond light-matter interaction with structured targets in ablation regime

POSTER

Abstract

Nanosecond laser ablation and plasma generation exhibit rich physics, which finds applications in diverse areas of science and technology. Prior works have focused on controlling laser ablation through shaping laser pulses and via materials selection. Here, we examine the effects of target structure on laser ablation efficiency and plasma formation. We experimentally investigate laser ablation of ultrathin film layered targets using nanosecond (5-20 ns) laser pulses with energies up to 0.7J. With time-resolved plasma plume imaging we study the way thin films influence plasma plume shape evolution. Ultrafast plasma spectroscopy and mass loss measurements allow us to measure plasma temperature and ablation efficiency. We compare our study of layered thin films with bulk materials and underline key differences in ablation dynamics. Our work on controlling laser ablation may find use in such areas as pulsed laser deposition (PLD), plasma based light sources, and micromachining.

Presenters

  • Pavel Shafirin

    Mechanical and Aerospace Engineering Department, University of California, Los Angeles, CA 90095, USA, University of California, Los Angeles

Authors

  • Pavel Shafirin

    Mechanical and Aerospace Engineering Department, University of California, Los Angeles, CA 90095, USA, University of California, Los Angeles

  • Durga Prasad

    University of California Los Angeles

  • Artur Davoyan

    Mechanical and Aerospace Engineering Department, University of California, Los Angeles, CA 90095, USA, University of California Los Angeles, University of California, Los ANgeles, University of California, Los Angeles