  We analyze the topological superconductivity and investigate the
spectroscopic properties manifested by the zero-energy modes, induced in a
metallic strip embedded into a Josephson-type junction. Focusing on the
Majorana polarization of such quasiparticles, we propose feasible means for its
empirical detection, using the spin-selective Andreev reflection method. Our
study reveals a gradual development of a transverse gradient of the Majorana
polarization across the metallic strip upon increasing its width. We also
inspect the spatial profile and polarization of the Majorana quasiparticles in
the presence of a strong electrostatic impurity. We show that, depending on its
position, such a defect can lead to a substantial localization of the Majorana
mode.
