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Sub-nanometer precision modification of the optical properties of three-dimensional polymer-based photonic crystals |
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| Authors: | Georg von Freymann Timothy Y.M. Chan Sajeev John Vladimir Kitaev Geoffrey A. Ozin Markus Deubel Martin Wegener |
| Affiliation: | aDepartment of Physics, University of Toronto, 60 St. George Street, Toronto, ON, Canada M5S 1A7 bMaterials Chemistry Research Group, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada M5S 3H6 cInstitut für Nanotechnologie, Forschungszentrum Karlsruhe in der Helmholtzgemeinschaft, 76021 Karlsruhe, Germany dInstitut für Angewandte Physik, Universität Karlsruhe (TH), 76128 Karlsruhe, Germany |
| Abstract: | We present a convenient post-fabrication technique to precisely tune the optical properties of polymer-based three-dimensional photonic crystals with sub-nanometer precision. Conventional air-plasma etching is utilized to modify the filling fraction of direct laser written polymer photonic crystals beyond the wavelength-imposed limits. Tuning of the optical properties is monitored in transmission and reflection spectroscopy. A simple model for the etching process is proposed and found to be in good agreement with the experimental observations. |
| Keywords: | 3D photonic crystals Tuning of optical properties Plasma etching |
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