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Laser induced patterning of Bi thin films

Published online by Cambridge University Press:  23 January 2013

Carlos Acosta Zepeda ,
Giovanni Mecalco ,
J. L. Hernández-Pozos ,
Marco Antonio Zepeda ,
N. Batina  and
E. Haro-Poniatowski
Carlos Acosta Zepeda
Affiliation:
Departamento de Física, Universidad Autónoma Metropolitana Iztapalapa, Av. San Rafael Atlixco No. 186 Col. Vicentina, C.P. 09340 México D.F., México;
Giovanni Mecalco
Affiliation:
Departamento de Física, Universidad Autónoma Metropolitana Iztapalapa, Av. San Rafael Atlixco No. 186 Col. Vicentina, C.P. 09340 México D.F., México;
J. L. Hernández-Pozos
Affiliation:
Departamento de Física, Universidad Autónoma Metropolitana Iztapalapa, Av. San Rafael Atlixco No. 186 Col. Vicentina, C.P. 09340 México D.F., México;
Marco Antonio Zepeda
Affiliation:
Departamento de Física, Universidad Autónoma Metropolitana Iztapalapa, Av. San Rafael Atlixco No. 186 Col. Vicentina, C.P. 09340 México D.F., México;
N. Batina
Affiliation:
Departamento de Química, Universidad Autónoma Metropolitana Iztapalapa, Av. San Rafael Atlixco No. 186 Col. Vicentina, C.P. 09340 México D.F., México.
E. Haro-Poniatowski
Affiliation:
Departamento de Física, Universidad Autónoma Metropolitana Iztapalapa, Av. San Rafael Atlixco No. 186 Col. Vicentina, C.P. 09340 México D.F., México;
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Abstract

Laser irradiation of Bismuth thin films through a diffractive mask was investigated. The thin films were composed of nano and microcrystals Bismuth with sizes ranging from 20 to 500 nm. Upon laser irradiation (λ=355 nm) the structured illumination field locally modified the material. In the high intensity regions the surface was transformed whilst low intensity areas were left intact. The modification mechanism was melting followed by coalescence of the nanocrystals giving rise to a more uniform structure. The laser irradiated area was characterized by scanning electron microscopy and atomic force microscopy. The patterns were computed by Fresnel diffraction theory and the agreement between the theory and the experiments was very good.

Keywords

laser-induced reactionfilmBi
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1477: Symposium S1A – Low-Dimensional Bismuth-based Materials , 2012 , imrc12-1477-s1a-o036
Copyright
Copyright © Materials Research Society 2012 

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References

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