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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 31, Iss. 6 — Jun. 1, 2014
  • pp: 1180–1185

Tight focusing of a double-ring-shaped, azimuthally polarized beam through a dielectric interface

Jianhua Shu, Ziyang Chen, Jixiong Pu, and Yongxin Liu  »View Author Affiliations

JOSA A, Vol. 31, Issue 6, pp. 1180-1185 (2014)

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We investigate the tight focusing properties of a double-ring-shaped, azimuthally polarized vector beam (DRS-APVB) by use of vectorial Debye theory. It is shown that a dark channel with an ultralong depth of focus (106λ) and subwavelength focal holes (0.5λ) can be generated by focusing a DRS-APVB through a dielectric interface with an annular high-numerical aperture (NA) objective lens. The influence of the NA of the objective, the relative refractive indices of two dielectric media, and the probe depth of the system on the focusing properties of the dark channel has been studied in detail. Such a non-diffracting dark channel could find potential applications in atom optical experiments, such as with atomic lenses, atom traps, and atom switches.

© 2014 Optical Society of America

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(260.0260) Physical optics : Physical optics
(260.5430) Physical optics : Polarization

ToC Category:
Physical Optics

Original Manuscript: February 28, 2014
Revised Manuscript: April 8, 2014
Manuscript Accepted: April 8, 2014
Published: May 7, 2014

Jianhua Shu, Ziyang Chen, Jixiong Pu, and Yongxin Liu, "Tight focusing of a double-ring-shaped, azimuthally polarized beam through a dielectric interface," J. Opt. Soc. Am. A 31, 1180-1185 (2014)

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