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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 24 — Nov. 26, 2007
  • pp: 15741–15746

Self-organized tungsten nanospikes grown on subwavelength ripples induced by femtosecond laser pulses

Quan-Zhong Zhao, Stefan Malzer, and Li-Jun Wang  »View Author Affiliations


Optics Express, Vol. 15, Issue 24, pp. 15741-15746 (2007)
http://dx.doi.org/10.1364/OE.15.015741


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Abstract

We report on the formation of nanoscale tungsten spikes generated on subwavelength periodic ripples which built up by single beam 800 nm femtosecond laser pulses. The nanospikes have a diameter ranging from 10 to 100 nm and are up to 250 nm in length. The nanospikes orientate from the ridges toward the valleys of the ripple structures independent of the polarization of the light. The heterogeneous nucleation of the liquid phase at the irradiated surface and the inhomogeneous surface roughness are considered as the mechanism of this nanospike formation.

© 2007 Optical Society of America

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(160.3900) Materials : Metals
(220.4000) Optical design and fabrication : Microstructure fabrication

ToC Category:
Laser Micromachining

History
Original Manuscript: September 12, 2007
Revised Manuscript: November 6, 2007
Manuscript Accepted: November 6, 2007
Published: November 12, 2007

Citation
Quan-Zhong Zhao, Stefan Malzer, and Li-Jun Wang, "Self-organized tungsten nanospikes grown on subwavelength ripples induced by femtosecond laser pulses," Opt. Express 15, 15741-15746 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-24-15741


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