Photochemistry of refractive index structures in poly(methyl methacrylate) by femtosecond laser irradiation
Photochemistry of refractive index structures in poly(methyl methacrylate) by femtosecond laser irradiation
复制标题
DOI：
10.1364/ol.32.000190
复制
发表时间：
2007-01-15
期刊：
影响因子：
3.6
通讯作者：
Chalker, Paul R.
中科院分区：
文献类型：
--
作者：
Baum, Alexandra;Scully, Patricia J.;Chalker, Paul R.
探索了387 nm的聚（甲基丙烯酸甲酯）（pMMA）的飞秒阈值光疗法，以实现光学成分的制造。挥发性片段分析（热解吸气体色谱 - 质量光谱法）和分子量重量分布监测（尺寸排除色谱）提示光化学修饰，涉及聚合物主链的直接裂解和通过单体形成下的链条解压缩的传播，类似。波导在未扎的临床级PMMA中产生，显示激光局灶区域的折射率增加（Delta N（Max）= 4 x 10（-3））。 （c）2006美国光学学会。
Femtosecond, subablation threshold photomodification of poly(methyl methacrylate) (PMMA) at 387 nm is explored to enable fabrication of optical components. Volatile fragment analysis (thermal desorption gas chromatography-mass spectrometry) and molecular weight distribution monitoring (size exclusion chromatography) suggest photochemical modification, involving direct cleavage of the polymer backbone and propagation via chain unzipping under formation of monomers, similar to the pyrolytic degradation of PMMA. Waveguides were produced in undoped, clinical-grade PMMA, showing an increased refractive index in the laser focal region (Delta n(max)=4 X 10(-3)). (c) 2006 Optical Society of America.