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Direct milling and casting of polymer-based optical waveguides for improved transparency in the visible range

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Authors:
  • Snakenborg, Detlef ;
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    Department of Micro- and Nanotechnology, Technical University of Denmark
  • Perozziello, Gerardo ;
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    Department of Micro- and Nanotechnology, Technical University of Denmark
  • Klank, Henning ;
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    Department of Micro- and Nanotechnology, Technical University of Denmark
  • Geschke, Oliver ;
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    Department of Micro- and Nanotechnology, Technical University of Denmark
  • Kutter, Jörg Peter
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    Department of Micro- and Nanotechnology, Technical University of Denmark
DOI:
10.1088/0960-1317/16/2/023
Abstract:
Polymer waveguides fabricated from photoresist have an inherent high propagation loss in the short visible wavelength range caused by absorption due to the added photosensitizers. We have addressed this problem by development of two novel methods for the fabrication of microfluidic systems with integrated optical waveguides. Polymethylinethacrylate (PMMA) is dissolved in anisole and 'doped' with styrene-arcylonitrile copolymer to vary the refractive index. The doped PMMA with a higher refractive index is then spin coated onto a PMMA substrate with a lower refractive index to provide waveguide properties. Direct micromilling enabled us to fabricate 100 mu m wide optical waveguides. Propagation losses of less than 1 dB cm(-1) could be achieved throughout the entire visual range down to a wavelength of 400 nm. A casting process amenable to high number production of such devices was furthermore developed.
Type:
Journal article
Language:
English
Published in:
Journal of Micromechanics and Microengineering, 2006, Vol 16, Issue 2, p. 375-381
Keywords:
Main Research Area:
Science/technology
Publication Status:
Published
Review type:
Peer Review
Submission year:
2006
Scientific Level:
Scientific
ID:
8689042

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