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., Donelly, 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), 3364-3369. (doi:10.1016/j.apsusc.2007.11.016).
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Description/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.
| Item Type: | Article |
|---|---|
| ISSNs: | 0169-4332 (print) |
| Related URLs: | |
| Keywords: | pulsed laser deposition, plasmas, femotsecond, langmuir probe, thin films, garnet crystal, epitaxy |
| Subjects: | Q Science T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology Q Science > QC Physics |
| Divisions: | University Structure - Pre August 2011 > Optoelectronics Research Centre |
| Item ID: | 54045 |
| Date Deposited: | 11 Aug 2008 |
| Last Modified: | 01 Jun 2011 04:49 |
| Contributors: | Darby, M.S.B. (Author) May-Smith, T.C. (Author) Eason, R.W. (Author) Donelly, T. (Author) Lunney, J.G. (Author) Rogers, K.D. (Author) |
| Date: | 30 March 2007 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/54045 |
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