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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 16 — Aug. 11, 2014
  • pp: 19149–19155

Fabrication of porous metal nanoparticles and microbumps by means of nanosecond laser pulses focused through the fiber microaxicon

Aleksandr Kuchmizhak, Stanislav Gurbatov, Yuri Kulchin, and Oleg Vitrik  »View Author Affiliations


Optics Express, Vol. 22, Issue 16, pp. 19149-19155 (2014)
http://dx.doi.org/10.1364/OE.22.019149


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Abstract

We present a novel optical element – fiber microaxicon (FMA) for laser radiation focusing into a diffraction-limited spot with Bessel-like profile as well as for precision laser nanostructuring of metal film surfaces. Using the developed FMA for single-pulse irradiation of Au/Pd metal films on quartz substrate we have demonstrated the formation of submicron hollow microbumps with a small spike atop as well as hollow spherical nanoparticles. Experimental conditions for controllable and reproducible formation of ordered arrays of such microstructures were defined. The internal structure of the fabricated nanoparticles and nanobumps was experimentally studied using both argon ions polishing and scanning electron microscopy. These methods reveal a porous inner structure of laser-induced nanoparticles and nanobumps, which presumably indicates that a subsurface boiling of the molten metal film is a key mechanism determining the formation process of such structures.

© 2014 Optical Society of America

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(160.3900) Materials : Metals
(310.0310) Thin films : Thin films

ToC Category:
Laser Microfabrication

History
Original Manuscript: June 19, 2014
Revised Manuscript: July 23, 2014
Manuscript Accepted: July 24, 2014
Published: July 31, 2014

Citation
Aleksandr Kuchmizhak, Stanislav Gurbatov, Yuri Kulchin, and Oleg Vitrik, "Fabrication of porous metal nanoparticles and microbumps by means of nanosecond laser pulses focused through the fiber microaxicon," Opt. Express 22, 19149-19155 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-16-19149


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