Thermal diffusivity in femtosecond-laser-structured micro-volumes of polymers |
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Authors: | Junko Morikawa Akihiro Orie Toshimasa Hashimoto Saulius Juodkazis |
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Institution: | (1) Faculty of Natural Sciences, Constantine the Philosopher University, Trieda A. Hlinku 1, 949 74 Nitra, Slovakia |
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Abstract: | Thermal diffusivity of laser micro-structured regions in plastics was determined using a temperature wave method with a lateral
resolution reduced to ∼10 μm using an array of micro-sensors. A high volume fraction (>25%) of laser modified phase was recorded
by tightly focused femtosecond-laser pulses inside films of poly-methylmethacrylate, non-oriented polyethylene, polystyrene,
and polyimide-Kapton. Changes in thermal diffusivity inside the laser-structured volumes of the order of a few percent were
reliably determined with the miniaturized sensors. The origin of the change of thermal properties in plastics is discussed. |
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Keywords: | |
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