Multiphoton laser-induced confined chemical changes in polymer films
作者： Deepak L. N. Kallepalli , Alan T. K. Godfrey , Jaspreet Walia , Fabio Variola , André Staudte
DOI: 10.1364/OE.389215
关键词:
摘要: We report ultrafast-laser-induced photochemical, structural, and morphological changes in a polyimide film irradiated at the polymer-glass interface back-incident geometry. Back-illumination creates locally hot material leading to confined photochemical change through blister formation. The laser-induced resulted new absorption luminescence properties visible region. laser-treated exhibited photoluminescence anisotropy resulting from formation of ordered polymer upon irradiation by linearly polarized ultrashort laser pulses. Confocal fluorescence microscopy similar observations bulk. Reflection-absorption infrared spectroscopy X-ray photoelectron together indicated confinement chemical interface.
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