Measurement of wurtzite ZnO/rutile TiO2 heterojunction band offsets by x-ray photoelectron spectroscopy |
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| Authors: | Wang Jun Liu Xiang-Lin Yang An-Li Zheng Gao-Lin Yang Shao-Yan Wei Hong-Yuan Zhu Qin-Sheng Wang Zhan-Guo |
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| Institution: | (1) Department of Materials Science, Mangalore University, Mangalagangothri - 547 199, India;(2) Department of Physics, NITK, Mangalagangothri - 547 199, India;(3) Department of Physics, NITK, Surathkal, Mangalore, 575025, India;(4) Department of Chemistry, Mangalore University, Mangalagangothri - 547 199, India; |
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| Abstract: | Four novel dmit complexes: (C2H5)4N]Ni (dmit)2], (C3H7)4N]Ni(dmit)2], (C2H5)4N]Au(dmit)2] and (C3H7)4N]Au(dmit)2], abbreviated as EtNi, PrNi, EtAu, and PrAu, were synthesized. The third-order nonlinear optical properties of them in acetonitrile
solutions were investigated by using the Z-scan technique with 20 ps pulses width at 1064 nm. When the on-axis irradiance
at focus I
0 was 5.025 GW/cm2, the nonlinear refraction coefficient n
2, the third-order nonlinear susceptibility χ
(3), the molecular second-order hyperpolarizability γ of the four types of material were obtained with subject to Z-scan curves, and these indexes were with the magnitudes of
10−18 m2/W, 10−13 esu, and 10−31 esu, respectively. The nonlinear absorption coefficient β of Ni samples had the 10−12 m/W scale. The impact of different metals and cations on the third-order nonlinear optical properties of materials was analyzed.
Through the derivation, the result suggests that these dmit complexes are promising candidates for applications to nonlinear
optical devices manufacture in the near-infrared waveband. |
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