Introduction
Recently, there has been considerable work in studying the natural singularities of scalar optics, namely, optical vortices. The vortices are rotational phase structures, with a singularity at center where phase is undefined. Study on such structures has become a new topic in modern optics called singular optics [1]. The concept has been extended to vector optics as polarization singularities, where the geometric polarization parameters of coherent fields cannot be defined [2]. The two types of polarization singularities are the C-points where the major axis of the polarization ellipse is not defined and the L-lines where the polarization handedness is not defined. These structures have been observed in the transverse plane of different fields [3-5]. The polarization singularities have significant importance in understanding the fine details of beams with complex polarization structure.
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Brundavanam, M.M., Miyamoto, Y., Takeda, M., Nakagawa, K. (2014). Transverse Polarization Structure of an Optical Vortex Beam around the Unfolding Point in a Birefringent Crystal. In: Osten, W. (eds) Fringe 2013. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-36359-7_113
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DOI: https://doi.org/10.1007/978-3-642-36359-7_113
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