The light propagation of a probe field pulse in a four-level double-lambda type system driven
by laser fields that form a closed interaction loop is studied. The finite frequency width of the …

We propose a model to manipulate group velocity of a multi-frequency probe light in an
electromagnetically induced transparency medium consisting of five-level cascade-type …

Propagation of an electromagnetic pulse through a dielectric slab doped with three-level
ladder-type atomic systems is discussed. It is shown that the group velocity of the reflected …

We study the formation of off-axis optical vortices propagating inside a double-Raman gain
atomic medium. The atoms interact with two weak probe fields as well as two strong pump …

The advent of electromagnetically induced transparency (EIT) offered a new coherent
material with exotic and controllable optical properties. Although, studies on single-EIT are …

The propagation of a weak probe field in a three-level quantum-dot molecule is investigated
by employing the tunnel coupling. It is shown that in the absence of tunnel coupling, the …

Propagation of Gaussian pulse in a defect dielectric medium in the presence of spin
coherence is theoretically investigated. We consider a dielectric slab doped with …

We theoretically investigate the optical bistability (OB) in a V-type three-level atomic system
confined in a unidirectional ring cavity via incoherent pumping field. It is shown that the …

The propagation of a Laguerre-Gaussian (LG) beam through a dispersive medium is
investigated. The effect of the doughnut-like intensity profile of the probe LG beam on the …

We proposed a simple model for investigating subluminal and superluminal light
propagation via an external magnetic field in an inhomogeneously broadened degenerate …