82 citations · 191 across the 12 of their papers we have counts for
4 papers · 1 filter
Triplet absorption spectroscopy and electromagnetically induced transparency
F. Ghafoor, R. G. Nazmitdinov
Coherence phenomena in four-level atomic system, cyclicly driven by three coherent fields, are investigated thoroughly at zero and weak magnetic fields. Each strongly interacting a…
Superluminal light propagation in a bi-chromatically Raman-driven and Doppler-broadened N-type 4-level atomic system
Bakht Amin Bacha, Fazal Ghafoor, Iftikhar Ahmad
We investigate the behavior of fast light pulse propagation in an N-type Doppler-broadened 4-level atomic system using double Raman gain processes. This system displays novel and i…
Avoidance of instability of a superluminal Gaussian light pulse via control of nonlinear coherence Kerr effect in a gain-assisted medium
Bakht Amin Bacha, Fazal Ghafoor
We investigate nonlinear Kerr-induced coherence effect on a superluminal probing light pulse in a gain-assisted N-type 4-level atomic system via an intense monochromatic laser fiel…
Hole-burning in an Autler-Townes doublet and in superluminal (subluminal) Electromagnetically induced transparency of a light pulse via a joint nonlinear coherent Kerr effect and Doppler broadening
Bakhtt A Bacha, Fazal Ghafoor, Iftikhar Ahmad
We investigate the behavior of light pulse propagation in a 4-level double Lambda atomic system under condition of electromagnetically induced transparency. The Fano type interfere…