Direct 3D Laser Writing by Two-Photon Illumination
Abstract:Multi-photon direct laser writing was demonstrated by several groups as flexible, fast, high-resolution technology for true 3D microstructuring. The number of applications employing this fast emerging technology is rapidly increasing. Related research extends from fabrication of 3D photonic crystals to structuring of biological materials. Ability to achieve subdiffractional resolution rests on the nonlinear nature of two-photon absorption. The flexibility of two-photon illumination allows to easily scale the resolution from 100nm to μm and mm range by selecting appropriate focusing optics and laser power parameters.
In this contribution we will present our recent progress in the direct-write femtosecond laser material processing. We have successfully fabricated micro- and nanostructures in various photosensitive materials. Using appropriate positioning software one can directly transfer CAD 3D models into photosensitive resins. Figure 1 shows a microspider fabricated by two-photon polymerization of commercial photoresist SU8. Recent studies of microstructures in hybrid polymers for applications in drug delivery and tissue engineering will be presented. Discussion on future prospects will conclude the presentation.
Document Type: Research Article
Publication date: 2005-01-01
For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.
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