Femtosecond two-photon stereo-lithography

M. Miwa, S. Juodkazis, T. Kawakami, Shigeki Matsuo, H. Misawa

Research output: Contribution to journalArticle

102 Citations (Scopus)

Abstract

We report herein a method for the three-dimensional (3D) fabrication of microstructures by means of direct fs-beam writing (scanning) inside a polymerizable resin. Photopolymerization takes place via two-photon absorption (TPA), as indicated by measurements of transmission power dependence. This concept of fabrication is based on two principles: the use of short, sub-picosecond pulses and simultaneous tight focusing (numerical aperture, NA > 1). This approach creates a unique opportunity for avoiding self-focusing even at very high intensities, as the power is lower than the self-focusing threshold. Under such conditions, no filament formation takes place and no thermal convection disturbance occurs in the focal vicinity during photo-polymerization. This technique requires no sacrificial layers or structures in real 3D micro-stereo-lithography.

Original languageEnglish
Pages (from-to)561-566
Number of pages6
JournalApplied Physics A: Materials Science and Processing
Volume73
Issue number5
DOIs
Publication statusPublished - 2001 Nov
Externally publishedYes

Fingerprint

Photopolymerization
self focusing
Lithography
lithography
Photons
Fabrication
fabrication
power transmission
picosecond pulses
photons
numerical aperture
Power transmission
free convection
resins
filaments
disturbances
polymerization
Resins
Scanning
microstructure

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Femtosecond two-photon stereo-lithography. / Miwa, M.; Juodkazis, S.; Kawakami, T.; Matsuo, Shigeki; Misawa, H.

In: Applied Physics A: Materials Science and Processing, Vol. 73, No. 5, 11.2001, p. 561-566.

Research output: Contribution to journalArticle

Miwa, M. ; Juodkazis, S. ; Kawakami, T. ; Matsuo, Shigeki ; Misawa, H. / Femtosecond two-photon stereo-lithography. In: Applied Physics A: Materials Science and Processing. 2001 ; Vol. 73, No. 5. pp. 561-566.
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