Cd_xZn_(1-x)Se/PMMA量子点有机复合材料的制备与激光防护研究

Research on Fabrication and Laser Protection of Cd_xZn_(1-x)Se/PMMA Quantum Dots Organic Composite

由于独特的非线性光学特性,量子点在激光防护领域受到了广泛的关注。但是,量子点易团聚变质的特点,使得其在应用过程中非线性光学效应大打折扣。为解决该问题,研究了三元量子点有机高分子复合材料的制备方法,并在532 nm激光条件下使用Z扫描技术对制备的Cd_xZn_(1-x)Se/PMMA量子点有机高分子材料进行了非线性光学性能研究。结果表明,以甲基丙烯酸甲酯为聚合物单体,过氧化苯甲酰为引发剂,采用改良的"共混法"成功制得了均一、稳定、透明的Cd_xZn_(1-x)Se/PMMA量子点有机复合材料;其最佳三阶非线性吸收、三阶非线性折射系数分别达到了7.90×10-8m/W与-0.99×10-8esu,非线性光学特性显著。因此,Cd_xZn_(1-x)Se/PMMA量子点有机高分子复合材料在激光防护材料中具有重要的潜在应用价值。

Due to the unique nonlinear optical properties, quantum dot draws an extensive attention in the field of laser protection. However, the nonlinear optical effect of quantum dots is greatly undermined by its feature of easy clustering and transmutation. To solve this problem, the method of fabricating the CdxZn1-xSe/polymethylmethacrylate （PMMA） has been researched, and Z-scan technique has been used to conduct a research on the nonlinear optical properties of the fabricated CdxZn1-xSe/PMMA quantum dot organic polymer composite under a condition of 532 nm laser. The results show that with the Methyl methacrylate （MMA） as a polymer monomer, and Benzoyl peroxide （BPO） as an initiator, a uniform, stable and transparent CdxZn1-xSe/PMMA quantum dot organic glass has been successfully fabricated by using a modified blending method. The best three order nonlinear absorption and refraction coefficients are respectively achieved 7.90×10^-8m/W and-0.99×10^-8 esu, and nonlinear properties is notable. Thus, the CdxZn1-xSe/PMMA quantum dot organic polymer composites have important and potential value in laser protection.