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

Andreas Schneider; Daniel Wolverson; Kathrin Sebald; Chris J Hodges; Martin H H 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, Kathrin Sebald, Chris J Hodges, Martin H H Kuball, Tobias Voss

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

2 Citations (Scopus)

4 Downloads (Pure)

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
Journal	Applied Physics Letters
Early online date	28 May 2013
DOIs	https://doi.org/10.1063/1.4807923
Publication status	Published - May 2013

Research Groups and Themes

CDTR

Keywords

ZnO, ultrashort laser pulses, strain, Raman

Access to Document

10.1063/1.4807923

Handle.net

Persistent link

Cite this

@article{8d015519ffe54cb799ee1fe03cff13da,

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 = "ZnO, ultrashort laser pulses, strain, Raman",

author = "Andreas Schneider and Daniel Wolverson and Kathrin Sebald and Hodges, \{Chris J\} and Kuball, \{Martin H H\} and Tobias Voss",

year = "2013",

month = may,

doi = "10.1063/1.4807923",

language = "English",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics (AIP)",

}

TY - JOUR

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, Kathrin

AU - Hodges, Chris J

AU - Kuball, Martin H H

AU - Voss, Tobias

PY - 2013/5

Y1 - 2013/5

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 - ZnO, ultrashort laser pulses, strain, Raman

U2 - 10.1063/1.4807923

DO - 10.1063/1.4807923

M3 - Article (Academic Journal)

SN - 0003-6951

JO - Applied Physics Letters

JF - Applied Physics Letters

ER -

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

Abstract

Research Groups and Themes

Keywords

Access to Document

Handle.net

Fingerprint

Cite this