Optical polymers with tunable refractive index for nanoimprint technologies

Journal article

Publication Details

Author(s): Landwehr J, Fader R, Rumler M, Rommel M, Bauer A, Frey L, Simon B, Fodor B, Petrik P, Schiener A, Winter B, Spiecker E
Journal: Nanotechnology
Publisher: Institute of Physics: Hybrid Open Access
Publication year: 2014
Volume: 25
Journal issue: 50
Pages range: Article number 505301
ISSN: 1361-6528


In order to realize a versatile high throughput production of micro-optical elements, UV-curable polymer composites containing titanium dioxide nanoparticles were prepared and characterized. The composites are based on an industrial prototype epoxy polymer. Titanium dioxide nanoparticles smaller than 10 nm were synthesized by the nonaqueous sol method and in situ sterically stabilized by three different organic surfactants. The composites exhibit high transparency. Distinct alteration of optical transmission properties for visible light and near IR wavelength range could be avoided by adaption of the stabilizing organic surfactant. Most importantly, the refractive index (RI) of the composites that depends on the fraction of incorporated inorganic nanoparticles could be directly tuned. E.g. the RI at a wavelength of 635 nm of a composite containing 23 wt% titanium dioxide nanoparticles is increased to 1.626, with respect to a value of 1.542 for the pure polymer. Furthermore, it could be demonstrated that the prepared inorganic-organic nanocomposites are well suited for the direct fabrication of low-cost micro-optical elements by nanoimprint lithography. A low response of the optical composite properties to temperature treatment up to 220°C with a shrinkage of only about 4% ensures its application for integrated micro-optical elements in industrial production.

FAU Authors / FAU Editors

Frey, Lothar Prof. Dr.
Lehrstuhl für Elektronische Bauelemente
Rumler, Maximilian
Lehrstuhl für Elektronische Bauelemente
Schiener, Andreas
Lehrstuhl für Kristallographie und Strukturphysik
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Apeleo Zubiri, Benjamin Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials
Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

External institutions with authors

Fraunhofer-Institut für Integrierte Systeme und Bauelementetechnologie (IISB)
Institute of Technical Physics and Materials Science (MFA)

Research Fields

B Nanoelectronic Materials
Exzellenz-Cluster Engineering of Advanced Materials
A2 Nanoanalysis and Microscopy
Exzellenz-Cluster Engineering of Advanced Materials

How to cite

Landwehr, J., Fader, R., Rumler, M., Rommel, M., Bauer, A., Frey, L.,... Spiecker, E. (2014). Optical polymers with tunable refractive index for nanoimprint technologies. Nanotechnology, 25(50), Article number 505301. https://dx.doi.org/10.1088/0957-4484/25/50/505301

Landwehr, J., et al. "Optical polymers with tunable refractive index for nanoimprint technologies." Nanotechnology 25.50 (2014): Article number 505301.


Last updated on 2019-29-05 at 15:55