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Journal article

Direct laser writing of three-dimensional network structures as templates for disordered photonic materials

  • Haberko, Jakub Physics Department and Fribourg Center for Nanomaterials, University of Fribourg Switzerland - Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Krakow, Poland
  • Muller, Nicolas Physics Department and Fribourg Center for Nanomaterials, University of Fribourg Switzerland
  • Scheffold, Frank Physics Department and Fribourg Center for Nanomaterials, University of Fribourg Switzerland
    14.10.2013
Published in:
  • Physical Review A. - 2014, vol. 88, no. 4, p. 043822
English In the present article we substantially expand on our recent study about the fabrication of mesoscale polymeric templates of disordered photonic network materials [Haberko and Scheffold, Opt. Expr. 21, 1057 (2013)]. We present a detailed analysis and discussion of important technical aspects related to the fabrication and characterization of these fascinating materials. Compared to our initial report we were able to reduce the typical structural length scale of the seed pattern from a=3.3μm to a=2μm, bringing it closer to the technologically relevant fiber-optic communications wavelength range around λ∼1.5μm. We have employed scanning electron microscopy coupled with focused ion beam cutting to look inside the bulk of the samples of different heights. Moreover, we demonstrate the use of laser scanning confocal microscopy to assess the real space structure of the samples fabricated by direct laser writing. We address in detail questions about scalability, finite size effects, and geometrical distortions. We also study the effect of the lithographic voxel shape, that is, the ellipsoidal shape of the laser pen used in the fabrication process. To this end we employ detailed numerical modeling of the scattering function using a discrete dipole approximation scheme.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/303410
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