The absorption spectrum of a weak probe, interacting with a driven degenerate two-level
atomic system, whose ground and excited hyperfine states are F g, e, can exhibit narrow …

We were able to arbitrarily control the speed of a light pulse from subluminal to superluminal
velocity by changing only the power of the laser for coupling coherently the single transition …

We investigate the atomic four-level N configuration both analytically and numerically, for
various pump and probe intensities, with and without transfer of coherence (TOC) and …

Coherent spectroscopy of degenerate two-level systems of the Doppler-broadened D 2
cesium line has been performed in vacuum and in buffer gas cells. Subnatural-width (SNW) …

We report experimental results on electromagnetically induced absorption spectra observed
in the system which does not satisfy completely the conditions given by Lezama [Phys. Rev …

We have analyzed the Hanle effect on the closed F g= 3→ F e= 4 D 2-line transition of 85
Rb. Exciting the rubidium atoms by circularly polarized laser light, and scanning an applied …

Saturation effects affecting absorption and fluorescence spectra of an atomic vapor confined
in an extremely thin cell (cell thickness L< 1 μ m) are investigated experimentally and …

We demonstrate a technique for continuous tuning of the Hanle effect from
electromagnetically induced transparency (EIT) to electromagnetically induced absorption …

We describe a computational and experimental study on Hanle electromagnetically induced
transparency and absorption resonance line shapes with a Laguerre Gaussian (LG) beam. It …

A thermal vapor of three-level atoms irradiated by two copropagating laser beams of suitable
frequencies exhibits the phenomenon of coherent population trapping, leading to an …