Filamentary cavity formation in poly(methyl methacrylate) by single femtosecond pulse
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- Sowa, S., Watanabe, W., Nishii, J. et al. Appl. Phys. A (2005) 81: 1587. doi:10.1007/s00339-005-3325-y
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A single femtosecond laser pulse creates a filamentary structural change along the optical axis inside bulk poly(methyl methacrylate). The filamentary structural change was revealed to be a cylindrical cavity based on scanning electron microscope examination, the presence of capillary action, and analysis of diffraction by an embedded diffraction grating. The cavity had a diameter of 0.8 μm and a length of 125 μm.