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Title: Analysis of strained surface layers of ZnO single crystals after irradiation with intense femtosecond laser pulses

Abstract

Structural modifications of ZnO single crystals that were created by the irradiation with femtosecond laser pulses at fluences far above the ablation threshold were investigated with micro-Raman spectroscopy. After light-matter interaction on the femtosecond time scale, rapid cooling and the pronounced thermal expansion anisotropy of ZnO are likely to cause residual strains of up to 1.8% and also result in the formation of surface cracks. This process relaxes the strain only partially and a strained surface layer remains. Our findings demonstrate the significant role of thermoelastic effects for the irradiation of solids with intense femtosecond laser pulses.

Authors:
; ;  [1];  [2]; ;  [3]
  1. Semiconductor Optics, Institute of Solid State Physics, University of Bremen, D-28359 Bremen (Germany)
  2. Nanoscience Group, Department of Physics, University of Bath, BA2 7AY Bath (United Kingdom)
  3. Center for Device Thermography and Reliability (CDTR), H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL (United Kingdom)
Publication Date:
OSTI Identifier:
22162958
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 102; Journal Issue: 21; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; CRYSTAL STRUCTURE; INTERACTIONS; IRRADIATION; LASER RADIATION; LAYERS; MONOCRYSTALS; PULSES; RAMAN SPECTRA; RAMAN SPECTROSCOPY; RESIDUAL STRESSES; SEMICONDUCTOR MATERIALS; SOLIDS; STRAINS; SURFACES; THERMAL EXPANSION; THERMOELASTICITY; ZINC OXIDES

Citation Formats

Schneider, Andreas, Sebald, Kathrin, Voss, Tobias, Wolverson, Daniel, Hodges, Chris, and Kuball, Martin. Analysis of strained surface layers of ZnO single crystals after irradiation with intense femtosecond laser pulses. United States: N. p., 2013. Web. doi:10.1063/1.4807923.
Schneider, Andreas, Sebald, Kathrin, Voss, Tobias, Wolverson, Daniel, Hodges, Chris, & Kuball, Martin. Analysis of strained surface layers of ZnO single crystals after irradiation with intense femtosecond laser pulses. United States. https://doi.org/10.1063/1.4807923
Schneider, Andreas, Sebald, Kathrin, Voss, Tobias, Wolverson, Daniel, Hodges, Chris, and Kuball, Martin. 2013. "Analysis of strained surface layers of ZnO single crystals after irradiation with intense femtosecond laser pulses". United States. https://doi.org/10.1063/1.4807923.
@article{osti_22162958,
title = {Analysis of strained surface layers of ZnO single crystals after irradiation with intense femtosecond laser pulses},
author = {Schneider, Andreas and Sebald, Kathrin and Voss, Tobias and Wolverson, Daniel and Hodges, Chris and Kuball, Martin},
abstractNote = {Structural modifications of ZnO single crystals that were created by the irradiation with femtosecond laser pulses at fluences far above the ablation threshold were investigated with micro-Raman spectroscopy. After light-matter interaction on the femtosecond time scale, rapid cooling and the pronounced thermal expansion anisotropy of ZnO are likely to cause residual strains of up to 1.8% and also result in the formation of surface cracks. This process relaxes the strain only partially and a strained surface layer remains. Our findings demonstrate the significant role of thermoelastic effects for the irradiation of solids with intense femtosecond laser pulses.},
doi = {10.1063/1.4807923},
url = {https://www.osti.gov/biblio/22162958}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 21,
volume = 102,
place = {United States},
year = {Mon May 27 00:00:00 EDT 2013},
month = {Mon May 27 00:00:00 EDT 2013}
}