2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/138224A method is presented for generation of a subwavelength (0.43 lambda) longitudinally polarized beam, which propagates without divergence over lengths of about 4 lambda in free space. This is achieved by controlling the amplitude, phase and polarization property of the Bessel-Gaussian field on the aperture of a high numerical aperture focusing lens.submitted to PRLPopular PhysicsOpticstext