Dynamic evolution of transverse energy flow in focused asymmetric optical vector-vortex beams |
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Authors: | Vijay KumarV.V.G. Krishna Inavalli Nirmal K. Viswanathan |
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Affiliation: | School of Physics, University of Hyderabad, Gachibowli, Hyderabad 500046, Andhra Pradesh, India |
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Abstract: | We present here controlled generation of asymmetric optical vector-vortex beams using a two-mode optical fiber and study the dynamic evolution of the transverse energy flow (TEF) when focused through a spherical lens. The dependence of the TEF on various factors such as the vortex charge, vortex anisotropy and polarization structure around the vortex core is explored. It is found that the TEF is directly proportional to the phase gradient and its direction is governed by the vortex charge. The presence of C-point polarization singularity in the beam and the polarization structure around it results in vibrational phase gradient which is the major factor deciding the TEF in vector-vortex beams. |
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Keywords: | OAM, orbital angular momentum AOVVB, asymmetric optical vector-vortex beam TEF, transfer energy flow TMF, two-mode fiber MIP, maximum intensity point CP, circular polarization IV, isotropic vortex AV, anisotropic vortex AF, anisotropy factor |
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