Defect Characterization Using Positron Annihilation Spectroscopy on Laser-Ablated Surfaces

Hosemann, Peter; Auguste, Rasheed; Lam, S.; Butterling, M.; Liedke, M. O.; Attallah, A. G.; Hirschmann, E.; Wagner, A.; Grigoropoulos, C. P.; Selim, Farida; Uberuaga, Blas P.

doi:10.1007/s11837-021-04965-8

Title: Defect Characterization Using Positron Annihilation Spectroscopy on Laser-Ablated Surfaces

Journal Article · Thu Oct 28 00:00:00 EDT 2021 · JOM. Journal of the Minerals, Metals & Materials Society

DOI:https://doi.org/10.1007/s11837-021-04965-8· OSTI ID:1868312

^[1]; Auguste, Rasheed ^[2]; Lam, S. ^[2];

^[3];

^[3]; Grigoropoulos, C. P. ^[2];

^[4];

^[5]

Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States)
Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße (Germany)
Bowling Green State Univ., OH (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

In recent years, short, pulsed laser ablation has been gaining popularity for machining small-scale test geometries from bulk samples and for efficient serial sectioning. These laser-based techniques are being added to the toolbox in material science, which makes it necessary to understand the changes in the material that occur from the laser–material interaction. Positron annihilation spectroscopy is a unique, nondestructive technique to investigate small defects in materials difficult to investigate by other tools. In this work, Doppler broadening and positron lifetime annihilation spectroscopy are utilized to help quantify the damage in materials treated with short, pulsed lasers. Using a femtosecond laser on single crystal silicon, this manuscript shows that clusters of vacancy-like defects and small voids increase systematically with laser power. Lastly, the damage induced by the laser can also reach to micrometer depths.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1868312

Report Number(s):: LA-UR-22-22974

Journal Information:: JOM. Journal of the Minerals, Metals & Materials Society, Vol. 73, Issue 12; ISSN 1047-4838

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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