What is it about?
With the development of the vector optical beam, diversified spatial structure of polarization are constantly emerging to provide more possibilities for controlling the spatiotemporal evolution of light and the light–matter interactions. The manipulation of polarization in the propagation direction also opens new ways to enrich the vector optical beam. Based on an amplitude-phase-polarization joint modulation method, we achieve to accurate and flexible longitudinal manipulation of localized polarization of the Bessel-like vector optical beam, mapping arbitrary circular trajectory on the Poincaré sphere. In addition, a dual-mode vector optical beam has been generated, which realizes the cascading of independent variations of polarization in different longitudinal ranges.
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Why is it important?
The spatial structure of polarization in the vector optical beam provides an additional degree of freedom to manipulate light and control the light–matter interaction. The manipulation of the variation of polarization during propagation along arbitrary circular trajectory of the Poincaré sphere enriches the vector optical beam from a different dimension and solves the problems of monotony. Besides, by manipulating the rate of variation of the polarization state, the vector optical beam with longitudinally varying polarization is expected to apply in fields like deep processing and remote sensing.
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This page is a summary of: Manipulating the variation of polarization during propagation along arbitrary circular trajectory of the Poincaré sphere, Applied Physics Letters, October 2022, American Institute of Physics, DOI: 10.1063/5.0120653.
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