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Based on angular amplitude modulation of orthogonal base vectors incommon-path interference method, we propose an interesting type of hybridvector beams with unprecedented azimuthal polarization gradient and demonstratein experiment. Distinct to previously reported types, the synthetic hybridvector beams exhibit geometrically intriguing projection tracks of angularpolarization state on Poincare sphere, more than just conventional circles.More noteworthily, the designed azimuthal polarization gradients are found tobe able to induce azimuthally non-uniform orbital angular momentum density,while generally uniform for circle-track cases, immersing in homogenousintensity background whatever base states are. Moreover, via tailoring relevantparameters, more special polarization mapping tracks can be handily achieved.These peculiar features may open alternative routes for new optical effects andapplications.

Hybrid vector beams with non-uniform orbital angular momentum density induced by designed azimuthal polarization gradient