Figure 1.

Schematic of the proposed four-level N-type Rb87 atom."

Figure 2.

Absorption spectral profile of spinning medium with the presence and absence of SGC effect versus Δp /γ such that γ  = 1 MHz, γ 1  = γ 2  = γ 3  = 1γ, Δc  = Δk  = 0γ, $N={10}^{12}\,{\rm{atoms}}\,{{\rm{cm}}}^{-3}$ , Φ1  = Φ2  = 1 Ωg  = 4.5γ and Ωc  = 1.5γ ."

Figure 3.

Dispersion spectrum of spinning medium with the presence and absence of SGC effect versus Δp /γ such that γ  = 1 MHz, γ 1  = γ 2  = γ 3  = 1γ, Δc  = Δk  = 0γ, $N={10}^{12}\,{\rm{atoms}}\,{{\rm{cm}}}^{-3}$ , Ωg  = 4.5γ Φ1  = Φ2  = 1 and Ωc  = 1.5γ ."

Figure 4.

Group refractive index in spinning medium with the presence and absence of SGC effect versus Δp /γ such that γ  = 1 MHz, γ 1  = γ 2  = γ 3  = 1γ, Δc  = Δk  = 0γ, $N={10}^{12}\,{\rm{atoms}}\,{{\rm{cm}}}^{-3}$ , Ωg  = 4.5γ Φ1  = Φ2  = 1 and Ωc  = 1.5γ ."

Figure 5.

Time advancement in the spinning medium with the presence and absence of SGC effect versus Δp /γ such that γ  = 1 MHz, γ 1  = γ 2  = γ 3  = 1γ, Δc  = Δk  = 0γ, $N={10}^{12}\,{\rm{atoms}}\,{{\rm{cm}}}^{-3}$ , Ωg  = 4.5γ, Φ1  = Φ2  = 1, Ωc  = 1.5γ and d = 6 mm."

Figure 6.

Rotations of polarization state of light and their transmitted image in the spinning medium with the presence and absence of SGC effect versus Δp /γ such that γ  = 1 MHz, γ 1  = γ 2  = γ 3  = 1γ, Δc  = Δk  = 0γ, Φ1  = Φ2  = 1 Ωg  = 4.5γ, Ωc  = 0.6γ and d = 6 mm."

Figure 7.

Rotations of polarization states of light and their transmitted images in the spinning medium with the presence and absence of SGC effect versus ω s such that γ  = 1 MHz, γ 1  = γ 2  = γ 3  = 1γ, Δc  = Δk  = 0γ, Φ1  = Φ2  = 1, Ωg  = 4.5γ, Ωc  = 1.5γ and d  = 6 mm."