Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 181, Issue 1, Pages 132-135Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2005.11.025
Keywords
two-photon polymerization; Eosin Y; acrylate monomer
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We report two-photon polymerization of an acrylate composite using a femtosecond laser at 1028 nm. The composite consists of an acrylate monomer, a free-radical co-initiator and a photo-sensitizer. The material is transparent to infrared laser radiation and absorbs strongly in the visible. By scanning the tightly focused laser beam, we employ two-photon absorption to polymerize and selectively solidify the material. Two photo-polymerization of organic composites permits the construction of complex-shaped three-dimensional structures of sub-micron resolution. Due to their versatile optical and chemical properties and the ability to mix them with active molecules, the materials described in this work are particularly useful for a variety of applications such as photonic devices, actuators and micro-fluidic devices. In addition, as both the single photon and the two-photon wavelengths are not in the ultraviolet part of the spectrum, this technique is particularly promising for incorporation into the photo-polymer of active molecules that are sensitive to UV radiation. (c) 2005 Elsevier B.V. All rights reserved.
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