Rapid bespoke laser ablation of variable period grating structures using a digital micromirror device for multi-colored surface images
Rapid bespoke laser ablation of variable period grating structures using a digital micromirror device for multi-colored surface images
A digital micromirror device has been used to project variable-period grating patterns at high values of demagnification for direct laser ablation on planar surfaces. Femtosecond laser pulses of ~1mJ pulse energy at 800nm wavelength from a Ti:sapphire laser were used to machine complex patterns with areas of up to ~1cm2 on thin films of bismuth telluride by dynamically modifying the grating period as the sample was translated beneath the imaged laser pulses. Individual ~30 by 30µm gratings were stitched together to form contiguous structures, which had diffractive effects clearly visible to the naked eye. This technique may have applications in marking, coding, and security features.
4984-4988
Heath, Daniel
d53c269d-90d2-41e6-aa63-a03f8f014d21
Mills, Ben
05f1886e-96ef-420f-b856-4115f4ab36d0
Feinäugle, Matthias
5b631cb4-197f-49db-ab27-352cad7ff656
Eason, Robert W.
e38684c3-d18c-41b9-a4aa-def67283b020
22 May 2015
Heath, Daniel
d53c269d-90d2-41e6-aa63-a03f8f014d21
Mills, Ben
05f1886e-96ef-420f-b856-4115f4ab36d0
Feinäugle, Matthias
5b631cb4-197f-49db-ab27-352cad7ff656
Eason, Robert W.
e38684c3-d18c-41b9-a4aa-def67283b020
Heath, Daniel, Mills, Ben, Feinäugle, Matthias and Eason, Robert W.
(2015)
Rapid bespoke laser ablation of variable period grating structures using a digital micromirror device for multi-colored surface images.
Applied Optics, 54 (16), .
(doi:10.1364/AO.54.004984).
Abstract
A digital micromirror device has been used to project variable-period grating patterns at high values of demagnification for direct laser ablation on planar surfaces. Femtosecond laser pulses of ~1mJ pulse energy at 800nm wavelength from a Ti:sapphire laser were used to machine complex patterns with areas of up to ~1cm2 on thin films of bismuth telluride by dynamically modifying the grating period as the sample was translated beneath the imaged laser pulses. Individual ~30 by 30µm gratings were stitched together to form contiguous structures, which had diffractive effects clearly visible to the naked eye. This technique may have applications in marking, coding, and security features.
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More information
Accepted/In Press date: 6 May 2015
e-pub ahead of print date: 6 May 2015
Published date: 22 May 2015
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 378397
URI: http://eprints.soton.ac.uk/id/eprint/378397
ISSN: 0003-6935
PURE UUID: ba331595-4c84-406b-85c7-4858e7e25c9b
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Date deposited: 29 Jun 2015 13:54
Last modified: 15 Mar 2024 03:27
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Contributors
Author:
Daniel Heath
Author:
Ben Mills
Author:
Matthias Feinäugle
Author:
Robert W. Eason
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