Vector Bessel Beams with Modified Field Distribution

In this work we theoretically introduce and experimentally examine a novel type Bessel-like beams which have an intensity distribution spherically modified by a polarization structure when compared to standard Bessel beams. Standard Bessel-Gaussian beams can be either linearly or radially and azimuthally polarized. Here, the Bessel-like beams with a Gaussian envelope, we are introducing, can have either spherically radial or meridional -azimuthal polarizations. In order to implement those beams experimentally we investigate their vector spatial spectra numerically for the case of a finite energy. A proper choice of the cone angles of individual plane wave components and sizes of Gaussian apertures, we can control experimentally intensity distribution of resulting beams. Lastly, we demonstrate that in two limiting cases we can form from our solutions either two optical needles or doughnut-like intensity patterns.