Yousef I Salamin 2009 New J. Phys. 11 033009 doi:10.1088/1367-2630/11/3/033009
Fields of a tightly focused radially polarized laser beam: the truncated series versus the complex-source-point spherical wave representation
Yousef I Salamin
Show affiliationsIn this paper, the fields of a radially polarized fundamental Gaussian beam are derived with a complex-source-point spherical wave approach and then compared and contrasted with those derived recently from a Lax series to the order of ε15, where ε is the diffraction angle. It is shown that the domain of validity of the derived fields is restricted by a discontinuity built into the vector potential from which they are obtained. Furthermore, in disagreement with recent experimental observations, the axial field intensity decreases with tighter focusing (decreasing waist radius at focus).
- PACS
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42.60.Jf Beam characteristics: profile, intensity, and power; spatial pattern formation
- Subjects
- Dates
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Issue 3 (March 2009)
Received 13 October 2008
Published 4 March 2009
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Fields of a tightly focused radially polarized laser beam: the truncated series versus the complex-source-point spherical wave representation
Yousef I Salamin 2009 New J. Phys. 11 033009
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