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Title

Thermal imaging of a heat transport in regions structured by femtosecond laser

Author(s)

Morikawa, Junko;  Hayakawa, Eita;  Hashimoto, Toshimasa;  Buividas, Ricardas;  Juodkazis, Saulius

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.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics

Source

Optics Express, Vol. 19, no. 21 (Oct 2011), pp. 20542-20550

Publication year

2011

FOR Code(s)

0205 Optical Physics;  0906 Electrical and Electronic Engineering;  1005 Communications Technologies

Keyword(s)

Femtosecond laser pulses;  Heat flow;  Heat transport;  Temperature;  Thermal imaging

Publisher

Optical Society of America

ISSN

1094-4087

Publisher URL

http://dx.doi.org/10.1364/oe.19.020542

Copyright

Copyright © 2011 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/oe.19.020542. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. The published version of the paper is reproduced here in accordance with the copyright policy of the publisher.

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