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Proceedings Paper

Fabrication of birefringent microstructures in transparent materials with femtosecond laser pulses
Author(s): Wataru Watanabe; Kazuhiro Yamada; Daisuke Kuroda; Taishi Shinagawa; Taishi Asano; Junji Nishii; Kazuyoshi Itoh
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Paper Abstract

When femtosecond laser pulses are tightly focused inside the bulk of transparent materials, the intensity in a focal volume become high enough to produce submicrometer-scale structural modifications. The modifications has been applied to fabricate 3D photonic structures. Tightly-focused femtosecond laser pulses create voids, which are surrounded by densified material. In this paper we show that the shapes of voids can be controlled by the spatial profile of incident laser pulse. We also show that the diffraction intensities due to the fabricated arrays of voids depend on the polarization-states of the readout beam. Finally, we demonstrate that irradiation of femtosecond laser pulses moves a void inside calcium fluoride and silica glass without any mechanical translations of the optical system. In situ observation revealed that a void moves towards incident direction of laser pulses as long as 2 micron.

Paper Details

Date Published: 18 June 2002
PDF: 7 pages
Proc. SPIE 4637, Photon Processing in Microelectronics and Photonics, (18 June 2002); doi: 10.1117/12.470622
Show Author Affiliations
Wataru Watanabe, Osaka Univ. (Japan)
Kazuhiro Yamada, Osaka Univ. (Japan)
Daisuke Kuroda, Osaka Univ. (Japan)
Taishi Shinagawa, Osaka Univ. (Japan)
Taishi Asano, Osaka Univ. (Japan)
Junji Nishii, National Institute of Advanced Industrial Science and Technology (Japan)
Kazuyoshi Itoh, Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 4637:
Photon Processing in Microelectronics and Photonics
Jan J. Dubowski; Willem Hoving; Koji Sugioka; Malcolm C. Gower; Richard F. Haglund; Alberto Pique; Frank Traeger; Jan J. Dubowski; Willem Hoving, Editor(s)

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