Spatial mode analysis of optical beams carrying monstar disclinations

Abstract Asymmetric polarization disclinations, such as monstars, can be generated in two distinct ways: (a) by an inseparable superposition of three spatial modes bearing optical vortices with circular states; (b) using a modulated Poincaré beam, consisting circularly-polarized fundamental Gaussian beam TEM 00 and second exhibiting azimuthally-modulated vortex m -fold rotational symmetry the opposite polarization. Based on analysis indirectly involved into through latter method, we investigate its capability spanning many disclinations possible, well enabling effective predictions about patterns, relevant geometric features, already at design stage.