Numerical aperture invariant focus shaping using spirally polarized beams

Bing Hao, James Leger

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


The concept of spiral polarization is proposed as an extension of the generalized cylindrical vector beam. The focusing properties of this spatially variant polarization under high NA are studied. It can be shown that with one such polarization, the focus maintains a flat-top intensity shape independent of NA from NA = 0.82 up to NA = 0.95.

Original languageEnglish (US)
Pages (from-to)1924-1928
Number of pages5
JournalOptics Communications
Issue number8
StatePublished - Apr 15 2008


  • Cylindrical vector beams
  • Image formation theory
  • Laser beam shaping
  • Optical confinement and manipulation
  • Polarization


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