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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 9, Iss. 5 — Apr. 29, 2014

Effect of vector asymmetry of radially polarized beams in solid immersion microscopy

Abdulkadir Yurt, Michael D. W. Grogan, Siddharth Ramachandran, Bennett B. Goldberg, and M. Selim Ünlü  »View Author Affiliations

Optics Express, Vol. 22, Issue 6, pp. 7320-7329 (2014)

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We theoretically and experimentally investigate the effect of imperfect vector symmetry on radially polarized beams focused by an aplanatic solid immersion lens at a numerical aperture of 3.3. We experimentally achieve circularly symmetric focused spot with a full-width-half-maximum of ~λ0/5.7 at λ0 = 1310nm, free-space wavelength. The tight spatial confinement and overall circular symmetry of the focused radially polarized beam are found to be sensitive to perturbations of its cylindrical polarization symmetry. The addition of a liquid crystal based variable retarder to the optical path can effectively ensure the vector symmetry and achieve circularly symmetric focused spots at such high numerical aperture conditions.

© 2014 Optical Society of America

OCIS Codes
(110.0180) Imaging systems : Microscopy
(050.4865) Diffraction and gratings : Optical vortices

ToC Category:

Original Manuscript: January 8, 2014
Revised Manuscript: February 24, 2014
Manuscript Accepted: February 25, 2014
Published: March 21, 2014

Virtual Issues
Vol. 9, Iss. 5 Virtual Journal for Biomedical Optics

Abdulkadir Yurt, Michael D. W. Grogan, Siddharth Ramachandran, Bennett B. Goldberg, and M. Selim Ünlü, "Effect of vector asymmetry of radially polarized beams in solid immersion microscopy," Opt. Express 22, 7320-7329 (2014)

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