Investigation of optical nonlinearities in Pd(po)2 by Z-scan technique |
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| Authors: | Sheng-Li Guo Li Xu Hui-Tian Wang Xiao-Zeng You NB Ming |
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| Institution: | aDepartment of Physics, Nanjing Institute of Meteorology, Nanjing 210044, China;bNational Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;cState Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China |
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| Abstract: | With nanosecond scale at a 532 nm wavelength, we firstly measured the nonlinear optical absorption and refraction coefficients of Pd(po)2 complex by using Z-scan technique, here Hpo=1-hydioxy-2-pyridone. We describe an empirical expression for the case when nonlinear refraction is accompanied by nonlinear absorption to separately evaluate the nonlinear refraction and the nonlinear absorption by performing straightforward measurements with the aperture removed. The nonlinear optical response of Pd(po)2 was determined by the linear decreasing irradiance-dependence. The nonlinear absorption originates from the near resonant two-photon absorption while the mechanism of the nonlinear refraction is the near resonant two-photon absorption transition enhancement. The linear increasing dependences of the optical nonlinearities on the incident irradiance arise from the population redistribution due to the near resonant two-photon absorption. |
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| Keywords: | Nonlinear absorption nonlinear refraction Pd(po)2 Z-scan technique |
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