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- W4328009342 abstract "Materials with large optical nonlinearity are highly desired for various applications such as all-optical signal processing and storage. Recently, indium tin oxide (ITO) has been found to possess strong optical nonlinearity in the spectral region where its permittivity vanishes. Here, we demonstrate that ITO/Ag/ITO trilayer coatings, deposited by magnetron sputtering with high-temperature heat treatment, can significantly enhance the nonlinear response in their effective epsilon-near-zero (ENZ) regions. The obtained results show that the carrier concentrations of our trilayer samples can reach 7.25 × 1021 cm-3, and the ENZ region can shift to the spectrum close to the visible range. In the ENZ spectral region, the ITO/Ag/ITO samples exhibit enhanced nonlinear refractive indices as large as 2.397 × 10-15 m2 W-1, over 27 times larger than that of an individual ITO layer. Such a nonlinear optical response is well described using a two-temperature model. Our findings provide a new paradigm for developing nonlinear optical devices for applications requiring low power." @default.
- W4328009342 created "2023-03-22" @default.
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- W4328009342 date "2023-01-01" @default.
- W4328009342 modified "2023-10-14" @default.
- W4328009342 title "Boosting optical nonlinearity in epsilon-near-zero trilayer coating" @default.
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- W4328009342 doi "https://doi.org/10.1039/d3cp00685a" @default.
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