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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/214896
- Controlled through-hole ablation of polymer microspheres
- Juodkazis, Saulius; Misawa, Hiroaki
- We report on ablation of complex micro-patterns on/in polymethylmethacrylate (PMMA) microspheres of 2–7µm diameter. By controlling the irradiation fluence, different ablation patterns can be reproduced: (i) the ablation of the opposite side to that irradiated, (ii) two-side ablation along the propagation of the beam and (iii) a through-hole ablation of the PMMA microsphere. Microspheres were laser trapped and held by tightly focused cw-illumination at 1064 nm while the ablation was carried out by a coaxial irradiation of a single laser pulse of 7 ns duration at 355 nm wavelength. Calculations of spatial intensity distribution of Mie light scattering by a laser-trapped microsphere corroborated the ablation patterns observed experimentally. Laser microfabrication of through-holes in microspheres is explained by the ablation-triggered shock waves. The ponderomotive action of the laser beam is discussed.
- Publication type
- Journal article
- Journal of Micromechanics and Microengineering, Vol. 14, no. 8 (Aug 2004), pp. 1244-1248
- Publication year
- FOR Code(s)
- 09 Engineering; 10 Technology
- Ablation; Laser microfabrication; Microspheres; PMMA; Polymethylmethacrylate
- Institute of Physics Publishing
- Publisher URL
- Copyright © 2004 IOP Publishing Ltd.
- Peer reviewed