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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 1, Iss. 5 — Sep. 1, 2011
  • pp: 990–995

Unexpected influence of focal depth on nucleation during femtosecond laser crystallization of glass

Adam Stone, Masaaki Sakakura, Yasuhiko Shimotsuma, Kiyotaka Miura, Kazuyuki Hirao, Volkmar Dierolf, and Himanshu Jain  »View Author Affiliations


Optical Materials Express, Vol. 1, Issue 5, pp. 990-995 (2011)
http://dx.doi.org/10.1364/OME.1.000990


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Abstract

Three-dimensional (3D) space-selective crystallization by femtosecond laser irradiation was investigated in LaBGeO5 glass. Heat modification could be induced space-selectively, but crystal nucleation showed an unexpected sensitivity to focal depth. Laser-induced heat modification profiles were inspected with optical microscopy and Raman spectroscopy in order to explain this phenomenon. We propose a mechanism based on heterogeneous nucleation at the surface of laser-induced defects and suggest strategies for achieving space-selective crystal nucleation.

© 2011 OSA

OCIS Codes
(220.4000) Optical design and fabrication : Microstructure fabrication
(220.4610) Optical design and fabrication : Optical fabrication
(320.2250) Ultrafast optics : Femtosecond phenomena

ToC Category:
Laser Materials Processing

History
Original Manuscript: July 14, 2011
Revised Manuscript: August 10, 2011
Manuscript Accepted: August 14, 2011
Published: August 19, 2011

Citation
Adam Stone, Masaaki Sakakura, Yasuhiko Shimotsuma, Kiyotaka Miura, Kazuyuki Hirao, Volkmar Dierolf, and Himanshu Jain, "Unexpected influence of focal depth on nucleation during femtosecond laser crystallization of glass," Opt. Mater. Express 1, 990-995 (2011)
http://www.opticsinfobase.org/ome/abstract.cfm?URI=ome-1-5-990


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