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Proceedings Paper

Optical microdevices fabricated using femtosecond laser processing (Conference Presentation)
Author(s): Adriano J. G. Otuka; Nathália B. Tomázio; Vinicius Tribuzi; Paulo Henrique D. Ferreira; Leonardo De Boni; Cleber R. Mendonça

Paper Abstract

Femtosecond laser processing techniques have been widely employed to produce micro or nanodevices with special features. These devices can be selectively doped with organic dyes, biological agents, nanoparticles or carbon nanotubes, increasing the range of applications. Acrylate polymers can be easily doped with various compounds, and therefore, they are interesting materials for laser fabrication techniques. In this work, we use multiphoton absorption polymerization (MAP) and laser ablation to fabricate polymeric microdevices for optical applications. The polymeric sample used in this work is composed in equal proportions of two three-acrylate monomers; while tris(2-hydroxyethyl)isocyanurate triacrylate gives hardness to the structure, the ethoxylated(6) trimethyl-lolpropane triacrylate reduces the shrinkage tensions upon polymerization. These monomers are mixed with a photoinitiator, the 2,4,6-trimetilbenzoiletoxifenil phosphine oxide, enabling the sample polymerization after laser irradiation. Using MAP, we fabricate three-dimensional structures doped with fluorescent dyes. These structures can be used in several optical applications, such as, RGB fluorescent microdevices or microresonators. Using azo compounds like dopant in the host resin, we can apply these structures in optical data storage devices. Using laser ablation technique, we can fabricate periodic microstructures inside polymeric bulks doped with xanthene dyes and single-walled carbon nanotubes, aiming applications in random laser experiments. In structured bulks we observed multi-narrow emission peaks over the xanthene fluorescence emission. Furthermore, in comparison with non-structured bulks, we observed that the periodic structure decreased the degree of randomness, reducing the number of peaks, but defining their position.

Paper Details

Date Published: 19 April 2017
PDF: 1 pages
Proc. SPIE 10095, Laser 3D Manufacturing IV, 100950B (19 April 2017); doi: 10.1117/12.2252834
Show Author Affiliations
Adriano J. G. Otuka, Instituto de Física de São Carlos, Univ. de São Paulo (Brazil)
Nathália B. Tomázio, Instituto de Física de São Carlos, Univ. de São Paulo (Brazil)
Vinicius Tribuzi, Univ. de São Paulo (Brazil)
Paulo Henrique D. Ferreira, Univ. Federal de São Carlos (Brazil)
Leonardo De Boni, Instituto de Física de São Carlos, Univ. de São Paulo (Brazil)
Cleber R. Mendonça, Instituto de Física de São Carlos, Univ. de São Paulo (Brazil)

Published in SPIE Proceedings Vol. 10095:
Laser 3D Manufacturing IV
Bo Gu; Henry Helvajian; Alberto Piqué; Corey M. Dunsky; Jian Liu, Editor(s)

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