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A comparative study of gadolinium gallium garnet growth by femtosecond and nanosecond pulsed laser deposition

Darby, M.S.B., May-Smith, T.C., Eason, R.W., Donnelly, T., Lunney, J.G. and Rogers, K.D. (2007) A comparative study of gadolinium gallium garnet growth by femtosecond and nanosecond pulsed laser deposition Applied Surface Science, 254, (11), pp. 3364-3369. (doi:10.1016/j.apsusc.2007.11.016).

Record type: Article

Abstract

The growth of epitaxial Nd:Gd (YAG) by femtosecond pulsed laser deposition is reported. We have used a Ti:sapphire laser at a wavelength of 800 nm and pulse length of 130 fs, operating at a repetition rate of 1 kHz. The film properties have been studied systematically as a function of the deposition parameters of laser fluence, spot-size, oxygen pressure, target-substrate distance and temperature. Scanning electron microscopy, atomic force microscopy and X-ray diffractometry were used to characterise the surface structure and crystallinity of the films. X-ray diffraction analysis shows that epitaxial growth has occurred. A comparison between the ion velocities produced by nanosecond and femtosecond laser ablation of the GGG target material has been investigated by the Langmuir probe technique. The results indicate a large difference in the plasma characteristics between femtosecond and nanosecond ablation, with ion velocities up to eight times faster observed in the femtosecond case.

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More information

Published date: 30 March 2007
Keywords: pulsed laser deposition, plasmas, femotsecond, langmuir probe, thin films, garnet crystal, epitaxy

Identifiers

Local EPrints ID: 54045
URI: http://eprints.soton.ac.uk/id/eprint/54045
ISSN: 0169-4332
PURE UUID: f403cab2-4869-4929-af93-d6f680009b27
ORCID for R.W. Eason: ORCID iD orcid.org/0000-0001-9704-2204

Catalogue record

Date deposited: 11 Aug 2008
Last modified: 11 Sep 2017 16:32

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Contributors

Author: M.S.B. Darby
Author: T.C. May-Smith
Author: R.W. Eason ORCID iD
Author: T. Donnelly
Author: J.G. Lunney
Author: K.D. Rogers

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