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Design and performance of a ZnSe tetra-prism for homogeneous substrate heating using a CO2 laser for pulsed laser deposition experiments

May-Smith, T.C., Muir, A.C., Darby, M.S.B. and Eason, R.W. (2008) Design and performance of a ZnSe tetra-prism for homogeneous substrate heating using a CO2 laser for pulsed laser deposition experiments Applied Optics, 47, (11), pp. 1767-1780. (doi:10.1364/AO.47.001767).

Record type: Article

Abstract

We report on the design and performance of a ZnSe tetra-prism for homogeneous substrate heating using a continuous wave CO2 laser beam in pulsed laser deposition experiments. We discuss here three potential designs for homogenizing prisms and use ray-tracing modeling to compare their operation to an alternative square-tapered beam-pipe design. A square-pyramidal tetra-prism design was found to be optimal and was subjected to modeling and experimental testing to determine the influence of interference and diffraction effects on the homogeneity of the resultant intensity profile produced at the substrate surface. A heat diffusion model has been used to compare the temperature distributions produced when using various different source intensity profiles. The modeling work has revealed the importance of substrate thickness as a thermal diffuser in producing a resultant homogeneous substrate temperature distribution.

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Published date: April 2008
Keywords: optical design and fabrication, optical devices, prisms, thin films, deposition and fabrication

Identifiers

Local EPrints ID: 54046
URI: http://eprints.soton.ac.uk/id/eprint/54046
ISSN: 0003-6935
PURE UUID: 242b03b4-4966-4981-a46c-9ec4e4203fda
ORCID for R.W. Eason: ORCID iD orcid.org/0000-0001-9704-2204

Catalogue record

Date deposited: 04 Aug 2008
Last modified: 11 Sep 2017 16:32

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Contributors

Author: T.C. May-Smith
Author: A.C. Muir
Author: M.S.B. Darby
Author: R.W. Eason ORCID iD

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