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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 21 — Oct. 16, 2006
  • pp: 10117–10124

Self-assembled periodic sub-wavelength structures by femtosecond laser direct writing

Weijia Yang, Erica Bricchi, Peter G. Kazansky, James Bovatsek, and Alan Y. Arai  »View Author Affiliations


Optics Express, Vol. 14, Issue 21, pp. 10117-10124 (2006)
http://dx.doi.org/10.1364/OE.14.010117


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Abstract

Self-assembled, sub-wavelength periodic structures are induced in fused silica by a tightly focused, linearly polarized, femtosecond laser beam. Two different types of periodic structures, the main one with period (ΛE) in the direction of the laser beam polarization and the second with period (Λk) in the direction of the light propagation, are identified from the cross-sectional images of the modified regions using scanning electron microscopy. We demonstrate the spatial coherence of these nanogratings in the plane perpendicular to the beam propagation direction. The range of effective pulse energy which could produce nanogratings narrows when the pulse repetition rate of writing laser increases. The period ΛE is proportional to the wavelength of the writing laser and period Λk in the head of the modified region remains approximately the wavelength of light in fused silica.

© 2006 Optical Society of America

OCIS Codes
(260.1440) Physical optics : Birefringence
(320.2250) Ultrafast optics : Femtosecond phenomena

ToC Category:
Ultrafast Optics

History
Original Manuscript: July 28, 2006
Revised Manuscript: September 22, 2006
Manuscript Accepted: September 22, 2006
Published: October 16, 2006

Citation
Weijia Yang, Erica Bricchi, Peter G. Kazansky, James Bovatsek, and Alan Y. Arai, "Self-assembled periodic sub-wavelength structures by femtosecond laser direct writing," Opt. Express 14, 10117-10124 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-21-10117


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References

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