Theoretical simulation results. Panels (a) and (b) show the modification of the ⁸⁷Rb atoms, panels (c) and (d) show the modification of the probe laser. In panels (a) and (b), the black line represents n₁, the red line denotes n₂, and the blue line refers to n₃. In these panels, the t, N, I, I₀, and N₀ denote the time, modification of the number of atoms, modification of the probe laser intensity, probe laser intensity, and the number of atoms. The P₁ and P₂ are the points we select from panels (c) and (d), where the a = 1, b = 1, I₀ = 1, k₁ = 0.001, k₂ = 0.005, s₁ = 0.01, s₂ = 0.05, n₁ = n₂ = 1/2, and n₂ = 0.