Third-order nonlinear optical properties of gold nanoshells in aqueous solution |
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| Authors: | D.J. Wu X.J. Liu L.L. Liu W.P. Qian |
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| Affiliation: | (1) Department of Electronic Science and Engineering, Key Lab of Modern Acoustics of MOE, Nanjing University, Nanjing, 210093, P.R. China;(2) Faculty of Science, Jiangsu University, Zhenjiang, 212013, P.R. China;(3) State Key Laboratory of Bioelectronics, Southeast University, Nanjing, 210096, P.R. China |
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| Abstract: | The third-order nonlinear optical properties of gold nanoshells in aqueous solution have been investigated by using open- and closed-aperture Z-scan methods. The real and imaginary third-order nonlinear susceptibilities are obtained to be about -1.1422×10-13 and -2.4302×10-14 esu, respectively. We further have investigated the electric field enhancement for gold nanoshells in aqueous solution by means of a finite-element method and ascribed the small third-order nonlinear susceptibility to the smaller volume fraction and local field factor. PACS 42.65.Re; 78.67.Bf; 73.22.Lp |
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