  In this letter we investigate the possibility to attain strongly confined
atomic localization using interacting Rydberg atoms in a Coherent Population
Trapping (CPT) ladder configuration, where a standing-wave (SW) is used as a
coupling field in the second leg of the ladder. Depending on the degree of
compensation of the Rydberg level energy shift induced by the van der Waals
(vdW) interaction, by the coupling field detuning, we distinguish between two
antiblockade regimes, i.e. a partial antiblockade (PA) and a full antiblockade
(FA). While a periodic pattern of tightly localized regions can be achieved for
both regimes, the PA allows much faster converge of spatial confinement
yielding a high resolution Rydberg state-selective superlocalization regime for
higher-lying Rydberg levels. In comparison, for lower-lying Rydberg levels the
PA leads to an anomalous change of spectra linewidth, confirming the importance
of using a stable uppermost state to achieve a superlocalization regime.
