Abstract
Titanium oxynitride (\({\hbox {TiO}}_{x}{\hbox {N}}_{y}\)) thin films were fabricated by ion beam-assisted sputtering deposition. Effects of oxygen contribution, assisting ion energy (\(E_{\mathrm{a}}\)), assisting ion beam current (\(I_{\mathrm{a}}\)) on the microstructure and dielectric behavior of the films were analyzed. The results show that increasing O content made the films to turn from fcc-TiN (111)-oriented to fcc \({\hbox {TiO}}_{x}{{\hbox {N}}}_{y}\) (220)-oriented. Proper \(E_{\mathrm{a}}\) and low \(I_{\mathrm{a}}\) can enhance the (220) orientation in \({\hbox {TiO}}_{x}{{\hbox {N}}}_{y}\) thin films. The increase in oxygen content leads to the red-shift of plasmonic resonant frequency and makes the films more dielectric. Higher \(E_{\mathrm{a}}\) and \(I_{\mathrm{a}}\) make the \({\hbox {TiO}}_{x}{{\hbox {N}}}_{y}\) films more metallic. Atomic composition is an important factor underlying the results. The study provides a method to control the plasmonic properties of oxynitride films in a wide range by atomic composition and assisting ions.
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Acknowledgements
The research is financially supported by National Natural Science Foundation of China (Project 51002010 and Project 11274040). We thank Dr. Xianfeng-Zhang for spectroscopic ellipsometry measurement.
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Jia, L., Lu, H., Ran, Y. et al. Structural and dielectric properties of ion beam deposited titanium oxynitride thin films. J Mater Sci 54, 1452–1461 (2019). https://doi.org/10.1007/s10853-018-2923-y
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DOI: https://doi.org/10.1007/s10853-018-2923-y