Steady-state linear optical properties and Kerr nonlinear optical response of a four-level quantum dot with phonon-assisted transition

She Yan-Chao^{1, 2, †,}, Luo Ting-Ting², Zhang Wei-Xi¹, Ran Mao-Wu¹, Wang Deng-Long^{2, ‡,}

Variations of the third-order self-Kerr and the cross-Kerr nonlinear susceptibility of the probe withΔ_pfor different strengths of PAT: (a)κ= 0.4 meV, (b)κ= 0.8 meV. Other parameters used are the same as those in Fig. 2.