Figure 10.

(a) The frequency dependencies of real (solid red line) and imaginary (dashed blue line) parts of ${\overline{\rho }}_{32}$ for fixed detuning $\Delta ={\Delta }_m$. (b) The time dependencies of the real parts of ${\rho }_{32}$ (thin green and red lines) and ${\rho }_{12}$ (thick blue and red lines) calculated by using Equation (24) (dashed lines) and by using direct numerical simulation (solid lines) of the full system of differential Equation (20) for density matrix elements upon Ladder-type interaction of two SPP modes and core–shell NW.