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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
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.
0003-6935
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
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), 4984-4988. (doi:10.1364/AO.54.004984).

Record type: Article

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: https://eprints.soton.ac.uk/id/eprint/378397
ISSN: 0003-6935
PURE UUID: ba331595-4c84-406b-85c7-4858e7e25c9b
ORCID for Ben Mills: ORCID iD orcid.org/0000-0002-1784-1012
ORCID for Robert W. Eason: ORCID iD orcid.org/0000-0001-9704-2204

Catalogue record

Date deposited: 29 Jun 2015 13:54
Last modified: 17 Jul 2019 01:20

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