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

Andreas Schneider; Daniel Wolverson; Katrin Sebald; Chris Hodges; Martin Kuball; Tobias Voss

doi:10.1063/1.4807923

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

Andreas Schneider, Daniel Wolverson, Katrin Sebald, Chris Hodges, Martin Kuball, Tobias Voss

Department of Physics

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2 Citations (SciVal)

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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.

Original language	English
Article number	211904
Journal	Applied Physics Letters
Volume	102
Early online date	28 May 2013
DOIs	https://doi.org/10.1063/1.4807923
Publication status	Published - 28 May 2013

Keywords

Raman
ZnO
strain measurement

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10.1063/1.4807923

ApplPhysLett 102 211904
Copyright 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Schneider, A, Wolverson, D, Sebald, K, Hodges, C, Kuball, M & Voss, T 2013, 'Analysis of strained surface layers of ZnO single crystals after irradiation with intense femtosecond laser pulses' Applied Physics Letters, vol 102, 211904, and may be found at http://dx.doi.org/10.1063/1.4807923
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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.",

keywords = "Raman, ZnO, strain measurement",

author = "Andreas Schneider and Daniel Wolverson and Katrin Sebald and Chris Hodges and Martin Kuball and Tobias Voss",

year = "2013",

month = may,

day = "28",

doi = "10.1063/1.4807923",

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volume = "102",

journal = "Applied Physics Letters",

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T1 - Analysis of strained surface layers of ZnO single crystals after irradiation with intense femtosecond laser pulses

AU - Schneider, Andreas

AU - Wolverson, Daniel

AU - Sebald, Katrin

AU - Hodges, Chris

AU - Kuball, Martin

AU - Voss, Tobias

PY - 2013/5/28

Y1 - 2013/5/28

N2 - 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.

AB - 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.

KW - Raman

KW - ZnO

KW - strain measurement

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DO - 10.1063/1.4807923

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SN - 0003-6951

VL - 102

JO - Applied Physics Letters

JF - Applied Physics Letters

M1 - 211904

ER -

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

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Raman confocal microscope RENISHAM INVIA

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

Abstract

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Raman confocal microscope RENISHAM INVIA

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