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Open Access Nano Express

Laser-Induced, Polarization Dependent Shape Transformation of Au/Ag Nanoparticles in Glass

G Seifert1*, A Stalmashonak1, H Hofmeister2, J Haug3 and M Dubiel3

Author Affiliations

1 Institut für Physik, Fachgruppe Optik, Martin-Luther-Universität Halle-Wittenberg, Hoher Weg 8, 06120, Halle, Germany

2 Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120, Halle, Germany

3 Institut für Physik, Fachgruppe ANM, Martin-Luther-Universität Halle-Wittenberg, Friedemann-Bach-Platz 6, 06099, Halle, Germany

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Nanoscale Research Letters 2009, 4:1380-1383  doi:10.1007/s11671-009-9408-5

Published: 11 August 2009

Abstract

Bimetallic, initially spherical Ag/Au nanoparticles in glass prepared by ion implantation have been irradiated with intense femtosecond laser pulses at intensities still below the damage threshold of the material surface. This high-intensity laser processing produces dichroism in the irradiated region, which can be assigned to the observed anisotropic nanoparticle shapes with preferential orientation of the longer particle axis along the direction of laser polarization. In addition, the particle sizes have considerably been increased upon processing.

Keywords:
Alloy nanoparticles; Glass; Laser irradiation; Femtosecond laser processing; Dichroism