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<p>Resonant near-surface absorption of mid-infrared (3.2–3.5 μm) laser pulses in undoped polymethylmethacrylate leads to formation of smooth convex tracks via laser swelling in pre-ablation mode accompanied by 5‒10 times wider laser-melted material redistribution zone with a reduced refractive index. Optical characteristics of inscribed structures and absence of Raman-detected chemical changes make them perspective for precise manufacturing of dye-free biocompatible polymer phase elements.</p>

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Mid-Infrared Resonant Laser Swelling of Polymethylmethacrylate for Production of Biocompatible Phase Micro-Optic Elements

  • 期刊论文

  • 发表日期：

    2025年12月16日

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  • A. V. Gorevoy,
  • N. A. Smirnov,
  • P. P. Paholchuk,
  • E. N. Rimskaya,
  • Yu. S. Gulina,
  • J. Zhu,
  • G. Kh. Sultanova,
  • S. V. Prokudin,
  • K. B. Pershin,
  • A. Yu. Tsygankov,
  • S. I. Kudryashov

摘要

Resonant near-surface absorption of mid-infrared (3.2–3.5 μm) laser pulses in undoped polymethylmethacrylate leads to formation of smooth convex tracks via laser swelling in pre-ablation mode accompanied by 5‒10 times wider laser-melted material redistribution zone with a reduced refractive index. Optical characteristics of inscribed structures and absence of Raman-detected chemical changes make them perspective for precise manufacturing of dye-free biocompatible polymer phase elements.