Combining six superluminal and subluminal structured light fields with right and left circular polarizations in a chiral medium through superposition

Abstract

The structured vector fields of circularly polarized light, comprising both left and right (RCP and LCP) beams superposed in the atomic medium are investigated in this work. At resonance in the anomalous/normal dispersion area, both RCP and LCP beams with a non-negative and non-positive group index of ±40 have been recorded. RCP and LCP beam group velocities are enhanced to ±1.5×109m/s at δ=0.15Γ, that is surpassing the speed of light in vacuum, denoted as ”c” leading to superluminal propagation. The RCP is superluminal and the LCP subluminal at the resonance point of the probe field. The group delay for The LCP beam is positive and the RCP beam is non-positive. The worth of the group delay for RCP and LCP beams varies to ±4ns. The superposing structured vectors field of superluminal and subluminal circularly polarized light beams on the right and left ER,L(r,φ) are strong variation function of detuning of probe field δ/Γ, Rabi frequency of control field Λ3/Γ and phase of collective driving fields φ. The results are useful for the modification of powerful computers.

Keywords

• Structured vector fields
• Superluminal
• Subluminal
• Circular-polarizations
• Chiral media
• Density matrix formalism