Ultrahigh resolution two-dimensional atomic localization via tunable surface plasmon polaritons

We theoretically investigate the two-dimensional (2D) atomic localization via tunable surface plasmon polaritons (SPPs) in hybrid nanosystem that comprises an ensemble of metallic nanoparticles (MNPs) coupled to a coherent three-level ?-type atomic medium embedded as a dielectric host. Since the MNPs are shined with laser fields, the SPPs are generated at the interface between the MNPs and dielectric medium. The resonances of SPPs in the MNPs are calculated analytically by means of Maxwell?s equations under specific boundary conditions, whereas the dynamics of the atomic system are derived using the density matrix method. Owing to space-dependent lightmatter interaction, the sharp localized peaks are observed in a single wavelength domain of 2D space with optimal probability. By optimizing the system parameters, ultrahigh-resolution and precision atomic localization can be achieved in a region smaller than ?/30 ? ?/30. The spatial resolution of atomic localization is efficiently improved compared to the previously studied cases. These results may have potential useful applications in the fields of quantum nanoplasmonics, nanomedicine, nanophotonics and nanotechnology.

Automated summary

The study investigates a new method for atomic localization in 2D space through the interaction between MNPs and atomic medium. By optimizing system parameters, high-resolution and precise atomic localization can be achieved in a specific spatial domain.