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Structures induced by irradiation of femto-second laser pulse in polymeric materials |
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| Authors: | Shigeru Katayama Mika Horiike Kazuyuki Hirao Naoto Tsutsumi |
| Affiliation: | 1. Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo, Kyoto 606-8585, Japan Core Technology Center, Nitto Denko Corporation, 1-1-2, Shimohozumi, Ibaraki, Osaka 567-8680, Japan;2. Core Technology Center, Nitto Denko Corporation, 1-1-2, Shimohozumi, Ibaraki, Osaka 567-8680, Japan Photon Craft Project, Japan Science and Technology Corporation, Keihanna Plaza Super-Lab. 2-6, 1-7 Hikaridai, Seika-cho, Kyoto 619-0237, Japan;3. Division of Material Chemistry, Graduate School of Engineering, Kyoto University, Sakyo, Kyoto 606-8501, Japan Photon Craft Project, Japan Science and Technology Corporation, Keihanna Plaza Super-Lab. 2-6, 1-7 Hikaridai, Seika-cho, Kyoto 619-0237, Japan;4. Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo, Kyoto 606-8585, Japan |
| Abstract: | We investigated the structures induced by irradiation of near-infrared femto-second laser pulse in various polymer materials; olefin gel, acrylic adhesive, poly(ether sulphone) (PES), poly(methyl methacrylate) (PMMA), polycarbonate (PC), and block copolymers of methyl-methacrylate and ethyl acrylate-butyl acrylate. Line irradiation that was performed by scanning laser spots in polymer bulk formed volcano-like upheaval structures on the surfaces of PES, PMMA, and PC, which have relatively high glass-transition temperatures (Tg's); on the other hand, cave or channel structures on the surfaces of olefin gel and acrylic adhesive have low Tg's. For the block copolymers containing both low and high Tg's, aggregation of the submicron scale deposit was induced in the polymer bulk. The submicron scale deposit may be reproduced structures after photodecomposition or photocrosslinking of polymer-chain components induced by multiphoton excitation with femto-second laser irradiation. This deposit aggregation with a stripelike structure had different optical properties from the un-irradiated region. These structures induced by irradiation of femto-second laser pulse might be applicable for optical devices such as diffraction grating and optical guide. © 2002 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 40: 537–544, 2002; DOI 10.1002/polb.10111 |
| Keywords: | femto-second laser polymer induced structure optical device block copolymers glass transition laser-induced polymers |