Figure 3.

Optical Kerr coefficient of probe beam with various coupling strengths and vibration lifetimes. (a) The optical Kerr coefficient (in units of ∑_m) as functions of probe-exciton detuning Δ_s with pump beam on-resonance (Δ_p = 0) and different coupling strengths. (b) The optical Kerr coefficient (in units of ∑_m) as functions of probe-exciton detuning Δ_s with pump beam on-resonance (Δ_p = 0) and different vibration lifetimes.