Department of Physics, Jamia Millia Islamia, New Delhi, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2013 Oct;114:164-9. doi: 10.1016/j.saa.2013.05.001. Epub 2013 May 13.
Nonlinear optical properties of 1,4-Diamino-9,10-Anthraquinone dye in solution at different concentrations are investigated by utilizing single beam Z-scan technique using a low power continuous wave laser (λ=532 nm). The anthraquinone dye is found to exhibit self-defocusing and reverse saturable absorption behavior. Effect of concentration on nonlinear refractive index and nonlinear absorption coefficient are also studied. The nonlinear absorption coefficient (β) and nonlinear refractive index (n2) have been evaluated from the open aperture and closed aperture Z-scan data and are found to increase with increase in concentration. The order of magnitude obtained for nonlinear refractive index and nonlinear absorption coefficient are found to be 10(-6) esu and 10(-4) m/W, respectively. The optical limiting behavior and induced self-diffraction patterns are also observed. To have a theoretical insight of nonlinear optical properties of 1,4-Diamino-9,10-Anthraquinone, first hyperpolarizability (β) is also evaluated by using quantum chemical calculations employing DFT method using 6-311 G basis set. The results obtained confirm the nonlinear optical behavior of 1,4-Diamino-9,10-Anthraquinone dye.
利用单光束 Z 扫描技术，在不同浓度下研究了 1,4-二氨基-9,10-蒽醌染料在溶液中的非线性光学性质，使用低功率连续波激光（λ=532nm）。研究发现蒽醌染料表现出自散焦和反饱和吸收行为。还研究了浓度对非线性折射指数和非线性吸收系数的影响。从开孔径和闭孔径 Z 扫描数据评估了非线性吸收系数（β）和非线性折射指数（n2），并发现它们随浓度的增加而增加。获得的非线性折射指数和非线性吸收系数的数量级分别为 10(-6) esu 和 10(-4) m/W。还观察到光限制行为和诱导自衍射图案。为了深入了解 1,4-二氨基-9,10-蒽醌的非线性光学性质，还通过使用 DFT 方法和 6-311 G 基组的量子化学计算，评估了一阶超极化率（β）。结果证实了 1,4-二氨基-9,10-蒽醌染料的非线性光学行为。
