Refractive index tuning and birefringence effect in crosslinked siloxane-acrylate copolymers for optical waveguide applications
Tunability of refractive index of polymeric waveguide material could be made by controlling free volume as well as polarizability of constituent materials. Two acrylate-co-polysiloxane series of different crosslinking network were synthesised by utilizing different crosslinker and monomer feeding ra...
| Published in: | Materials Chemistry and Physics |
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| Main Author: | |
| Format: | Article |
| Language: | English |
| Published: |
Elsevier Ltd
2024
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| Online Access: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85194034180&doi=10.1016%2fj.matchemphys.2024.129433&partnerID=40&md5=44eb9cfa7868a330c07171b20394a7e1 |
| Summary: | Tunability of refractive index of polymeric waveguide material could be made by controlling free volume as well as polarizability of constituent materials. Two acrylate-co-polysiloxane series of different crosslinking network were synthesised by utilizing different crosslinker and monomer feeding ratio. Using Claussius-Mossotti/Lorentz-Lorentz (CM/LL) model, fractional free volumes were calculated showing a decrease in the experimental (nexp) compared to theoretical (ni) refractive indices. Curing agent with asymmetrical configuration induce a crosslink network of higher birefringence. They were respectively fabricated into multimode channel waveguide whose core-clad refractive index differences (Δn) show values in the range 0.0049–0.0408. © 2024 Elsevier B.V. |
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| ISSN: | 2540584 |
| DOI: | 10.1016/j.matchemphys.2024.129433 |