SCN-TLM simulation of femtosecond optical in a four level two electron atomic system governed by Pauli Exclusion Principle

A simulation model of electromagnetic wave´s propagation, in four-level two-electron atomic systems is presented in this work. These systems, submitted to an electromagnetic wave, are governed by Pauli Exclusion Principle and they are modeled using the Time-Domain Transmission Line Matrix (TLM) method with the symmetrical condensed node (SCN) and novel voltage sources. The development of the proposed model is based on the incorporation, in Maxwell´s equations, of the coupled rate equations with Pauli Exclusion Principle, taking into account the dynamic pumping in the TLM formulation. The scattering matrix characterizing the SCN with the new voltage sources is provided and the numerical results are compared with those of the literature or the theoretical ones.