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Synthesis of polyurethane-imids and application in surface plasmon polaritons waveguide

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Abstract

The crosslinkable electro-optic (EO) polymers polyurethane-imides (PUI) were designed and synthesized with monomers azo chromophore, phenyl diisocyanate and aromatic dianhydrides. Molecular structure characteristics for the polymers were evidenced by nuclear magnetic resonance (1HNMR) and fourier transform infrared (FTIR) spectroscopy. PUI as cladding, the strip long-range surface plasmon polaritons (LRSPPs) waveguides were designed and fabricated. The LRSPPs waveguiding along 18-nm-thin and 8-µm-wide gold stripes buried in EO PUI polymers were characterized at the light wavelength of 1310 nm and 1550 nm. The results indicated that the PUI can be used as preparation surface plasmon polaritons EO polymer optical waveguide materials, due to the merits of crosslinkable property, thermal stability, good film-forming ability, high processability and low optical waveguide propagation loss in near-infrared wave band.

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Acknowledgements

This work was supported by the Natural Science Foundation of Education Department of Anhui Province under grant no. KJ2018A0465, Natural Science Foundation of Anhui Provincial Department of Science and Technology (Grant No. 1808085ME109), and the National Natural Science Foundation of China (Grant No. 61875241).

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Wang, LD., Tong, L., Wu, JW. et al. Synthesis of polyurethane-imids and application in surface plasmon polaritons waveguide. Appl. Phys. A 127, 6 (2021). https://doi.org/10.1007/s00339-020-04150-9

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