Application of femtosecond Bessel-Gauss beam in microstructuring of transparent materials

A. Marcinkevičius, S. Juodkazis, V. Mizeikis, S. Matsuo, H. Misawa

Research output: Contribution to journalConference article

10 Citations (Scopus)

Abstract

We demonstrate a new technique for femtosecond microfabrication in transparent dielectrics, which employs non-diffracting Bessel-Gauss beams instead of commonly used Gaussian beams. The main advantage achieved this way is the ability to record linear photomodified tracks, extending along the line of non-diffracting beam propagation without sample translation, as would be required for Gaussian beams. The initial near infrared Gaussian laser beam was transformed into the non-diffracting Bessel-Gauss beam by a glass axicon (apex angle 160 deg). The beam was imaged into the bulk of the sample by a telescope consisting of two positive lenses, which allowed to vary the focusing cone angle from 5° to 19°, and maximum non-diffracting propagation distance up to 1 cm. We have recorded pre-programmed patterns of multi-shot damage tracks (diameter about 3 μm), extended uniformly along the z-axis by varying the damage spot coordinates in the x - y plane. The experiments were carried out in various transparent dielectrics: silica glass, sapphire, and plexyglass. Physical processes underlying the Gauss-Bessel microfabrication, and its potential applications for stereolithography, 3D microstructuring, and photonic crystal fabrication will be discussed.

Original languageEnglish
Pages (from-to)150-158
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4271
DOIs
Publication statusPublished - 2001 Jan 1
Externally publishedYes
EventOptical Pulse and Beam Propagation III - San Jose, CA, United States
Duration: 2001 Jan 242001 Jan 25

Keywords

  • Axicon
  • Bessel-Gauss beam
  • Femtosecond laser microfabrication
  • Light-induced damage threshold

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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