Tight focusing of generalized cylindrical vector beam with high NA lens axicon

Focusing properties of the generalized cylindrical vector beam with high numerical aperture lens axicon system is investigated theoretically by vector diffraction theory. Results show that intensity distribution in the focal region can be tailored considerably by appropriately adjusting the polarization angle. Peak-centered, donut and flat top focal shapes with extended focal depth, potentially useful in optical tweezers, material processing and laser printing can be obtained using this technique.