Investigation of polarization effects for high-numerical-aperture first-order Laguerre-Gaussian beams by 2D scanning with a single fluorescent microbead

N. Bokor, Yoshinori Iketaki, Takeshi Watanabe, Masaaki Fujii

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

The focal intensity distribution of strongly focused (NA=0.9) first-order Laguerre-Gaussian doughnut beams is investigated experimentally for three different polarizations: linear, and left-handed circular and right-handed circular. The investigations are done by 2-dimensional scanning the focal plane with of a 100nm diameter fluorescent microbead, and measuring the fluorescence signal. The results are shown to be in excellent agreement with theoretical predictions, and demonstrate the superiority of one of the circular polarizations to achieve a sharp dark central spot.

Original languageEnglish
Pages (from-to)10440-10447
Number of pages8
JournalOptics Express
Volume13
Issue number26
DOIs
Publication statusPublished - Dec 22 2005

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numerical aperture
circular polarization
linear polarization
fluorescence
scanning
polarization
predictions

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Investigation of polarization effects for high-numerical-aperture first-order Laguerre-Gaussian beams by 2D scanning with a single fluorescent microbead. / Bokor, N.; Iketaki, Yoshinori; Watanabe, Takeshi; Fujii, Masaaki.

In: Optics Express, Vol. 13, No. 26, 22.12.2005, p. 10440-10447.

Research output: Contribution to journalArticle

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