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...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Elsevier
2024
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/41919/1/Refractive%20index%20tuning%20and%20birefringence%20effect%20in%20crosslinked_ABST.pdf http://umpir.ump.edu.my/id/eprint/41919/2/Refractive%20index%20tuning%20and%20birefringence%20effect%20in%20crosslinked.pdf http://umpir.ump.edu.my/id/eprint/41919/ https://doi.org/10.1016/j.matchemphys.2024.129433 https://doi.org/10.1016/j.matchemphys.2024.129433 |
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| 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. |
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