Z-scan studies and optical limiting in a new organic-polymer composite film

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• 作者：H. L. Saadon
• 关键词：Nonlinear optical polymer ; Nonlinear optical and optical limiting properties ; Reverse saturable absorption
• 刊名：Optical and Quantum Electronics
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：48
• 期：1
• 全文大小：640 KB
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• 作者单位：H. L. Saadon (1)
  
  1. Laser Applications and Optical Materials Group, Department of Physics, College of Science, University of Basrah, Basrah, Iraq
  
• 刊物主题：Optics, Optoelectronics, Plasmonics and Optical Devices; Electrical Engineering; Characterization and Evaluation of Materials; Computer Communication Networks;
• 出版者：Springer US
• ISSN：1572-817X

文摘

Nonlinear optical (NLO) properties of a new poly[[(s)-1-(4-nitrophenyl)-2-pyrrolidinethyl]methacrylate] (PPM) in polymethylmethacrylate (PMMA) at different peak incident intensities ranging from 0.6 to 2 kW/cm2 are investigated using the open and closed aperture Z-scan technique under CW DPSS laser at 532 nm wavelength. The optical nonlinearity is intensity dependent. The experimentally results showed that the composite film exhibits self-defocusing nonlinearity with large nonlinear refractive index and good nonlinear absorption behavior. The observed nonlinear refraction and absorption are attributed to thermal in nature and reverse saturable absorption, respectively. The PPM/PMMA composite film also exhibits an interesting optical power limiting of the CW laser with good optical limiting threshold. These studies indicate that the new composite film may open new possibilities of using this material in all-optical limiting and switching devices. Keywords Nonlinear optical polymer Nonlinear optical and optical limiting properties Reverse saturable absorption