Propagation dynamics and experimental observation of quadratic vortex beam |
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Authors: | Chen Zi-Yang and Pu Ji-Xiong |
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Affiliation: | College of Information Science & Engineering, Institute of Optics & Photonics, Huaqiao University, Xiamen 361021, China;College of Information Science & Engineering, Institute of Optics & Photonics, Huaqiao University, Xiamen 361021, China |
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Abstract: | The concept of a quadratic vortex beam is proposed, in which phase term of the beam is given by exp(i mθ2). The phase of the quadratic vortex beam increases with azimuthal angle nonlinearly. This change in phase produces several unexpected effects. Unlike the circularly symmetric beam spot of normal vortex beams, the intensity distribution of the quadratic vortex beam is shown to be asymmetric. The phase singularities will shift in the transverse beam plane on propagation. |
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Keywords: | vortex beam phase singularity propagation dynamics |
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