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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 18 — Jun. 20, 2013
  • pp: 4131–4136

Curved laser microjet in near field

Victor V. Kotlyar, Sergey S. Stafeev, and Alexey A. Kovalev  »View Author Affiliations

Applied Optics, Vol. 52, Issue 18, pp. 4131-4136 (2013)

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With the use of the finite-difference time-domain-based simulation and a scanning near-field optical microscope that has a metal cantilever tip, the diffraction of a linearly polarized plane wave of wavelength λ by a glass corner step of height 2λ is shown to generate a low divergence laser jet of a root-parabolic form: over a distance of 4.7λ on the optical axis, the beam path is shifted by 2.1λ. The curved laser jet of the FWHM length depth of focus=9.5λ has the diameter FWHM=1.94λ over the distance 5.5λ, and the intensity maximum is 5 times higher than the incident wave intensity. The discrepancy between the analytical and the experimental results amounts to 11%.

© 2013 Optical Society of America

OCIS Codes
(050.1380) Diffraction and gratings : Binary optics
(050.1940) Diffraction and gratings : Diffraction
(180.4243) Microscopy : Near-field microscopy

ToC Category:

Original Manuscript: March 14, 2013
Revised Manuscript: April 29, 2013
Manuscript Accepted: May 17, 2013
Published: June 12, 2013

Victor V. Kotlyar, Sergey S. Stafeev, and Alexey A. Kovalev, "Curved laser microjet in near field," Appl. Opt. 52, 4131-4136 (2013)

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