Coherent control of narrow structures in absorption, transparency and dispersion by interference induced among the Rabi-split resonances

The evolution of nonlinear behaviour of electromagnetically induced absorption and transparency subject to coherent perturbation, is presented in a triply driven five-level atomic system. It has been shown that the coherence effects like absolute line narrowing, single or multiple transparencies, sharply varying dispersion and two opposite types of quantum switching can be efficiently controlled by interference induced among the Rabi-split resonances at various situations. As far as measurement induced subwavelength atom localization is concerned, this model can be very much useful in controlling single peak atom localization in subwavelength and sub-half-wavelength domain by three different ways.