Optical limiting studies of ZnO nanotops and its polymer nanocomposite films
Optical limiting studies of ZnO nanotops and its polymer nanocomposite films
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DOI：
10.1063/1.4745605
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发表时间：
2012-08
影响因子：
4
通讯作者：
P. C. Haripadmam;M. Kavitha;H. John;B. Krishnan;P. Gopinath
中科院分区：
文献类型：
--
作者：
P. C. Haripadmam;M. Kavitha;H. John;B. Krishnan;P. Gopinath
在本工作中，我们用Z扫描技术研究了氧化锌纳米顶胶和聚合物-氧化锌纳米复合薄膜的光限幅特性。用两种不同的封顶剂制备了氧化锌纳米颗粒。采用旋涂法制备了两种浓度的聚甲基丙烯酸甲酯-氧化锌纳米复合薄膜。在脉冲纳秒激光照射下，纳米胶体的双光子吸收系数随激光剂量和粒子尺寸的增大而增大。发现复合薄膜的限幅效率得到了提高，为光电子器件的制造开辟了一条新的道路。
In the present work, we have investigated the optical limiting property of zinc oxide (ZnO) nanotop colloids and nanocomposite films of polymer-ZnO nanotops, using Z-scan technique. ZnO nanotops are prepared using two different capping agents. Films of polymethyl methacrylate-ZnO nanotop composite are fabricated for two concentrations of ZnO using spin coating technique. On exposing the nanocolloids to a pulsed nanosecond laser, the two photon absorption coefficient is enhanced with increase in applied fluence and particle size. The efficiency of limiting is found to be enhanced for the composite films, opening a way towards optoelectronic device fabrication.