Optical nonlinearities of BaTiO3 matrix-embedded Au nanoparticles |
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| Affiliation: | 1. The MacDiarmid Institute for Advanced Materials and Nanotechnology, SCPS, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand;2. National Isotope Centre, GNS Science, PO Box 31312, Lower Hutt 5010, New Zealand;3. Advanced Microscopy Facility, Bio21 Institute, University of Melbourne, Victoria, 3010, Australia;1. Nagaoka University of Technology, Nagaoka, Japan;2. Tokyo Institute of Technology, Kanagawa, Japan;1. B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Pr. Independency, 68, Minsk, 220072, Belarus;2. Belarusian National Technical University, Pr. Independency, 65, Minsk, 220013, Belarus;3. Leibniz Institute of Photonic Technology (IPHT), 07702, Jena, Germany;1. Inter University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi, India;2. Department of Physics and Astronomy, Indian Institute of Technology Kharagpur, Kharagpur, India;3. Amity University, Noida 201313, Uttar Pradesh, India;1. Graduate School of Engineering, Toyota Technological Institute, 2-12-1 Hisakata, Tempaku, Nagoya 468-8511, Japan;2. Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan;3. Department of Chemical System Engineering, the University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan;4. Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai Ube 755-8611, Japan |
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| Abstract: | Composite thin films Au/BaTiO3 comprising nanometer-sized gold particles embedded in BaTiO3 matrices were synthesized on MgO(1 0 0) substrates by co-depositing Au and BaTiO3 targets using pulsed laser deposition technique. The nanostructure of the films and the size distributions of the Au particles were analyzed by high-resolution transmission electron microscopy. Crystal lattice fringes from the Au nanocrystals and BaTiO3 matrices were observed. The nonlinear optical properties of the Au/BaTiO3 films were measured using z-scan method at the wavelength of 532 nm with a laser duration of 10 ns. The nonlinear refractive index n2 and the nonlinear absorption coefficient β were determined to be 2.72 × 10?6 esu and ?1.1 × l0?6 m/W, respectively. |
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