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Impact of inorganic Nanoparticles on optical Properties of Low Refractive Index Waveguiding Polymers

: Goldenberg, Leonid M.; Köhler, Mathias; Kahle, Olaf; Dreyer, Christian

Volltext urn:nbn:de:0011-n-6154515 (1.1 MByte PDF)
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Erstellt am: 26.11.2020

Optical Materials Express 10 (2020), Nr.11, S.2987-2997
ISSN: 2159-3930
Bundesministerium für Bildung und Forschung BMBF (Deutschland)
Wachstumskerne; 03VKCT1C; PolyPhotonics
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IAP ()

The objective of this work is to improve the optical properties of low refractive index polymers used for waveguide by introduction of inorganic nanoparticles. Copolymers of fluorinated monomers and glycidyl methacrylate are used. Introduction of SiO2 nanoparticles into polymer matrix is performed by direct mixing; copolymerization with SiO2 nanoparticles modified by monomer, and in situ sol-gel formation of SiO2 during photochemical cross-linking and annealing catalyzed by photoacid generator. It is demonstrated that nanoparticles are able to decrease thermo-optic coefficient. It is also possible to fabricate waveguiding layers by direct introduction of nanoparticles without compromising of optical propagation losses.