Journal
OPTICS LETTERS
Volume 36, Issue 17, Pages 3479-3481Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.36.003479
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Funding
- National Natural Science Foundation of China (NSFC) [10974101, 61036013]
- Ministry of Science and Technology of China [2009DFA52300]
- National Research Foundation of Singapore [NRF-G-CRP 2007-01]
- Tianjin Municipal Science and Technology Commission [11JCZDJC15200]
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Generation of a nondiffracting transversally polarized beam by means of transmitting an azimuthally polarized beam through a multibelt spiral phase hologram and then highly focusing by a high-NA lens is presented. A relatively long depth of focus (similar to 4.84 lambda) of the electric field with only radial and azimuthal components is achieved. The polarization of the wavefront near the focal plane is analyzed in detail by calculating the Stokes polarization parameters. It is found that the polarization is spatially varying and entirely transversally polarized, and the polarization singularity disappears at the beam center, which makes the central bright channel possible. (C) 2011 Optical Society of America
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