Bin Guo, Zhongshuai Zhang, Yanyan Huo, Shuyun Wang, Tingyin Ning, "Modulation of epsilon-near-zero wavelength and enhancement of third-order optical nonlinearity in ITO/Au multilayer films," Chin. Opt. Lett. 21, 013602 (2023)
- Chinese Optics Letters
- Vol. 21, Issue 1, 013602 (2023)
Fig. 1. (a) Theoretical real part of effective permittivity of ITO/Au multilayer stacks. (b) Schematic diagram of an ITO-Au multilayer stack. (c) Cross-sectional image and (d) surface morphology of the IAI-4 multilayer film obtained by SEM.
Fig. 2. XRD patterns of the pure ITO film and IAI-4 multilayer film.
Fig. 3. Experimentally determined permittivity of the pure ITO film and effective permittivity of the multilayer films.
Fig. 4. (a) OA and (b) CA Z-scan data with the theoretical fittings for pure ITO film and multilayer films.
Fig. 5. Carrier concentration, resistivity, and nonlinear optical response versus the thickness of the Au layer.
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Table 1. Saturable Absorption Coefficient β , Nonlinear Refractive Index n 2, and Carrier Concentrations in the Samples
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