A Semi-classical Floquet-NEGF Method to Model Opto-electronic Devices

In recent years, opto-electronic devices have become ubiquitous. The non-equilibrium Green's function formalism (NEGF) is traditionally employed to model opto-electronic devices, since this method allows a rigorous inclusion of intricate electron-photon interactions, based on a quantum electrodynamical description. Typically, the resulting solution scheme consists of self-consistently calculating the involved Green's functions and the self-energy contributions of the included interactions. However, the required iteration loop is computationally expensive, such that the wide-spread application of this method is limited.

We propose a novel modeling scheme based on Floquet-NEGF theory. By using semi-classical arguments, the electron-photon interactions are treated at the Hamiltonian level so that the self-consistent loop is circumvented. Consequently, the advocated method is significantly faster while maintaining accuracy, which permits its application to more intricate structures, as will be demonstrated during the presentation.