Enhanced Kerr nonlinearity in a quantized four-level graphene nanostructure

Solookinejad Ghahraman, Panahi M, Ahmadi E, Hossein Asadpour Seyyed^†,

(a) Linear susceptibility χ⁽¹⁾ versus probe light detuning. Solid line corresponds to linear absorption and dashed line corresponds to dispersion. (b) Nonlinear susceptibility χ⁽³⁾ versus probe light detuning. Solid line corresponds to nonlinear absorption and dashed line corresponds to Kerr nonlinearity. Parameter θ = π/6 and others are the same as Fig. 2.