Journal
OPTICS LETTERS
Volume 36, Issue 7, Pages 1185-1187Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.36.001185
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Funding
- Doctoral Program of Higher Education [20102302120008]
- National Natural Science Foundation of China (NSFC) [61008039, 60978044]
- National High Technology Research and Development Program of China (863) [2009AA04Z304]
- Special Foundation of China Postdoctoral Science [201003459]
- China Postdoctoral Science Foundation [20080440899]
- Harbin Institute of Technology [HITQNJS.2009.025]
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The longitudinal component of a focused beam is split into two parts along the optical axis to obtain a longitudinally polarized long focal depth using amplitude filtering based on Euler transformation and a radially polarized Bessel-Gaussian beam. Numerical results indicate that long focal depth and FWHM can be easily achieved with 9 lambda and 0.8 lambda, respectively. A radially polarized beam can be converted into a longitudinally polarized beam with a conversion efficiency of 51.0%. It can therefore be believed that the proposed scheme can be widely used to generate a longitudinally polarized beam for particle acceleration, laser cutting, and optical trapping. (C) 2011 Optical Society of America
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