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Studies of third-order optical nonlinearities and optical limiting of 2, 3-butanedione dihydrazone

机译：2,3-丁二酮二hydr的三阶光学非线性和光学极限的研究

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摘要

2, 3-butanedione dihydrazone (BDDH) synthesized via chemical route and nonlinear optical parameters, such as nonlinear refractive index (n_(2)), nonlinear absorption coefficient (beta), third-order nonlinear optical susceptibility ((chi)~(3)), second hyperpolarizability (gamma), and optical-limiting behavior were investigated by single beam z-scan technique for different concentrations. Synthesized sample were irradiated by a Q-switched, frequency doubled Nd:YAG laser and found that n_(2) and beta increases linearly with increasing concentration and hence gamma decreases linearly. The excited-state absorption cross sections of BDDH were found to be larger than ground-state absorption cross sections, and it leads to reverse saturable absorption (RSA). The experimental results are well in agreement with the theory and also establish BDDH as one of the potential candidate materials for optical limiting at 532 nm.
机译：2，3-丁二酮二hydr（BDDH）通过化学路线和非线性光学参数合成，例如非线性折射率（n_（2）），非线性吸收系数β，三阶非线性光学敏感性（（chi）〜（3） ）），第二超极化率（γ）和光学限制行为通过单光束z扫描技术研究了不同的浓度。用调Q倍频Nd：YAG激光辐照合成样品，发现n_（2）和β随着浓度的增加线性增加，因此γ线性减少。发现BDDH的激发态吸收截面大于基态吸收截面，并且导致反向饱和吸收（RSA）。实验结果与理论相吻合，并且将BDDH确立为532 nm光学限幅的潜在候选材料之一。

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