Chinese Optics Letters, Volume. 21, Issue 1, 013602(2023)
Modulation of epsilon-near-zero wavelength and enhancement of third-order optical nonlinearity in ITO/Au multilayer films
Figures & Tables(6)
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.
Table 1. Saturable Absorption Coefficient
β , Nonlinear Refractive Indexn 2, and Carrier Concentrations in the SamplesView tableView in ArticleTable 1. Saturable Absorption Coefficient
β , Nonlinear Refractive Indexn 2, and Carrier Concentrations in the SamplesSample β (×10−8 m/W) n2 (×10−14 m2/W) Carrier Concentrations (×1021 cm−3) Pure ITO −4.99 2.55 0.13 IAI-2 −11.64 8.01 1.13 IAI-3 −13.89 11.16 4.98 IAI-4 −17.80 11.21 6.86
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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[J]. Chinese Optics Letters, 2023, 21(1): 013602
Paper Information
Category: Nanophotonics, Metamaterials, and Plasmonics
Received: Jun. 14, 2022
Accepted: Aug. 10, 2022
Posted: Aug. 11, 2022
Published Online: Sep. 8, 2022
The Author Email: Shuyun Wang (wangsy@sdnu.edu.cn), Tingyin Ning (ningtingyin@sdnu.edu.cn)
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