Comparative Study of Light Manipulation in Three-Level Systems Via Spontaneously Generated Coherence and Relative Phase of Laser Fields *

Nguyen Huy Bang,Le Nguyen Mai Anh,Nguyen Tien Dung,Le Van Doai

Fig. 2 (Color online) Variations of the group refractive index $n_{g}$ versus $\Delta{}$$_{p}$ for different values of p = 0 (dashed line), p = 0.7 (dot-dashed line), and p = 0.9 (solid line) when $\eta{}$ = 1, $\varphi{}$ = 0, $\Delta{}$$_{c}$ = 0, $G_{p}$$_{ }$= 5$\gamma{}$, $G_{c}$ = 10$\gamma{}$: (a) $\Lambda$-type system, (b) Ladder-type system, and (c) V-type system.