Processing Structures on Human Fingernail Surfaces Using a Focused Near-Infrared Femtosecond Laser Pulse

DOI Web Site Web Site 6 Citations 31 References
  • Hayasaki Yoshio
    Department of Optical Science and Technology, Faculty of Engineering, The University of Tokushima
  • Takagi Hayato
    Department of Optical Science and Technology, Faculty of Engineering, The University of Tokushima
  • Takita Akihiro
    Department of Optical Science and Technology, Faculty of Engineering, The University of Tokushima
  • Yamamoto Hirotsugu
    Department of Optical Science and Technology, Faculty of Engineering, The University of Tokushima
  • Nishida Nobuo
    Department of Optical Science and Technology, Faculty of Engineering, The University of Tokushima
  • Misawa Hiroaki
    Research Institute for Electronic Science, Hokkaido University

Search this article

Description

We investigated the processing of a human fingernail surface using a tightly focused femtosecond laser pulse. The processed structure in the fingernail surface is strongly dependent on the focus position and irradiation energy of the single laser pulse. We observed a ring, a simple pit, a small pit with a surrounding uplift, an irregular jagged surface, and a swell containing a void, depending on the focus position. We also observed a sudden change in the size of the processed structure according to the irradiation pulse energy. From a linear theoretical estimation based on the diffraction of the laser beam, we found that the sudden change is primarily due to the diffraction pattern generated by the circular aperture of the objective lens. We also describe the processing features by comparing the structures processed in a fingernail with those processed in glass.

Journal

Citations (6)*help

See more

References(31)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top