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Holographic interferometry for the structural diagnostics of UV laser ablation of polymer substrates |
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| Authors: | A Bonarou L Antonucci V Tornari S Georgiou C Fotakis |
| Institution: | (1) Institute of Electronic Structure and Lasers, Foundation for Research and Technology – Hellas, P.O. Box 1527, 71 110 Heraklion, Crete, Greece, GR;(2) Department of Physics, University of Crete, Heraklion, Crete, Greece, GR;(3) Department of Mechanical Engineering, University of Ancona, Italy, IT;(4) Department of Physics, University of Crete, Heraklion, Crete, Greece, GR |
| Abstract: | Holographic interferometry is examined for its potential as a diagnostic tool of the structural modifications effected in laser-processing applications. The interferometric ‘comparison’ of the holographic images of the sample recorded before and after irradiation enables the full-field spatially resolved detection of the induced structural modifications. The potential of the method is illustrated in the ablation of polymer (polymethylmethacrylate and polystyrene) films with nanosecond pulses at 193 and 248 nm. The detailed characterization and quantitative monitoring of the growth of the induced modifications as a function of laser-material parameters is attained. A most novel result is the observation of delocalised structural modifications at distances relatively far away (d≈2 cm) from the irradiated area. Received: 15 August 2001 / Accepted: 16 August 2001 / Published online: 2 October 2001 |
| Keywords: | PACS: 79 20 D 61 82 P 42 40 Kw 42 40 My |
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