title: Thermal imaging of a heat transport in regions structured by femtosecond laser.
abstract: A non-contact determination of thermal diffusivity and spatial distribution of temperature on tens-of-micrometers scale is demonstrated by thermal imaging. Temperature localization and a heat flow have been in situ monitored with ∼ 10 ms temporal resolution in Kapton polymer films structured by femtosecond laser pulses. The structured regions can localize temperature and create strong thermal gradients of few degrees over tens-of-micrometers (∼ 0.1 K/μm). This is used to induce an anisotropy in a heat transport. Temperature changes on the order of ∼ 0.1°C were reliably detected and spatial spreading by diffusion was monitored using Fourier analysis. Application potential, miniaturization prospects, and emissivity changes induced by laser structuring of materials are discussed.
authors: Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8550, Japan. morikawa.j.aa@m.titech.ac.jp
authors: Junko
authors: J
authors: Morikawa
authors: Eita
authors: E
authors: Hayakawa
authors: Toshimasa
authors: T
authors: Hashimoto
authors: Ričardas
authors: R
authors: Buividas
authors: Saulius
authors: S
authors: Juodkazis
mesh_terms: D000465:Algorithms; D016880:Anisotropy; D004058:Diffusion; D004738:Engineering / Q000379:methods; D004867:Equipment Design; D005583:Fourier Analysis; D006358:Hot Temperature; D007834:Lasers; D008422:Materials Testing; D055095:Optics and Photonics; D011108:Polymers / Q000737:chemistry; D013696:Temperature
chemical_list: D011108:Polymers