The polar solvents dependent linear and third-order nonlinear optical (NLO) characteristics of acid blue 3 (AB 3) dye has been reported in this paper. A low power continuous wave (CW) diode laser working at 635 nm wavelength was used to perform the Z-scan experiments in the present study. AB 3 dye was dissolved with different polar solvents of 1-propanol, ethanol, dimethyl sulfonate (DMSO) and water at a concentration of 0.01 mM. The nonlinear index of refraction (n₂) of AB 3 dye was ascribed to self-defocusing effect, and nonlinear coefficient of absorption (β) signifies the behaviors of saturable and reverse saturable absorption. The real and imaginary components of the third-order NLO susceptibility of AB 3 dye in the present polar solvents have been measured to be of the order of 10^─6 esu. The influence of polar solvents on third-order NLO susceptibility of the dye sample studied has been discussed. The second-order hyperpolarizability (γ) of AB 3 dye has also been studied and estimated to be of the order of 10^─30 esu. The experimental results suggest that AB 3 dye may be a promising candidate for applications in nonlinear optics.

中文翻译：

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酸性蓝 3 染料的溶剂依赖性线性和非线性光学特性。

本文报道了酸性蓝 3 (AB 3) 染料依赖于极性溶剂的线性和三阶非线性光学 (NLO) 特性。在本研究中，使用工作在 635 nm 波长的低功率连续波 (CW) 二极管激光器来执行 Z 扫描实验。AB 3 染料用1-丙醇、乙醇、磺酸二甲酯(DMSO)和水的不同极性溶剂以0.01mM的浓度溶解。AB 3 染料的非线性折射率(n ₂ )归因于自散焦效应，非线性吸收系数(β)表示可饱和和反饱和吸收行为。AB 3 染料在目前的极性溶剂中的三阶非线性光学敏感性的实部和虚部已被测量为 10 ─6 的数量^级埃苏。已经讨论了极性溶剂对所研究染料样品的三阶非线性光学敏感性的影响。还研究了 AB 3 染料的二阶超极化率 (γ)，估计其数量级为 10 ^─30 esu。实验结果表明AB 3 染料可能是非线性光学应用的有前途的候选者。