标题：Z-scan study of third-order nonlinear optical properties of three dmit complexes
作者：Chen, J. W.; Wang, X. Q.; Ren, Q.; Li, T. B.; Yang, H. L.; Cai, N. N.
作者机构：[Chen, J. W.] Shandong Univ Technol, Sch Sci, Zibo 255049, Shandong, Peoples R China.; [Wang, X. Q.; Cai, N. N.] Shandong Univ, State Key Lab Crysta 更多
通讯作者地址：[Chen, JW]Shandong Univ Technol, Sch Sci, Zibo 255049, Shandong, Peoples R China.
关键词：Organometallic complexes; Z-scan; Nonlinear optical properties
摘要：Three dmit(2-) complexes, [(C4H9)(4)N](2)[Mn(dmit)(2)], [(C4H9)(4)N](2)[Cu(dmit)(2)] and [(C3H7)(4)N] [Ni(dmit)(2)], abbreviated as BuMn, BuCu and PrNi, were synthesized. Their third-order nonlinear optical properties in acetonitrile were investigated using the laser Z-scan technique with 20 ps pulses at 1064nm. The Z-scan spectra revealed that BuMn exhibited self-focusing effect and negligible nonlinear absorption, BuCu exhibited self-defocusing effect and two-photon absorption, PrNi exhibited self-focusing effect and a stronger saturable absorption. The reason for the difference was analyzed. The nonlinear refractive index n(2), the third-order nonlinear susceptibility square((3)), the molecular second-order hyperpolarizability of these complexes were with the magnitude of 10(-18) m(2)/W, 10(-13) esu and 10(-31) esu, respectively. All these results suggest that these materials are candidates for application in the different nonlinear optical fields at infrared band. (C) 2015 Elsevier GmbH. All rights reserved.