Modeling Infrared Superlattice Photodetectors: From Nonequilibrium Green’s Functions to Quantum-Corrected Drift Diffusion

• DOI: 10.1103/physrevapplied.16.044024
• Publication Date: 2021-10-14T21:30:46Z
• Authors: Alberto Tibaldi; Jesus Alberto Gon...; Marco Vallone; Michele Goano; Enrico Bellotti; Francesco Bertazzi
• Keywords: Semiclassical physics

Carrier transport in type-II superlattice photodetectors is investigated by means of a rigorous nonequilibrium Green's function model based on physics-based B\"uttiker-probe formalism. Intraband scattering self-energies (carrier-phonon interactions) are computed the self-consistent Born approximation, while interband (Shockley-Read-Hall and optical transitions) included terms semiclassical generation-recombination rates, neglecting renormalization effects. Current conservation achieved with an efficient Newton-Raphson algorithm. While carrier infrared detectors usually understood quantities (e.g., mobilities quasi-Fermi-levels) that admittedly not germane to theory, proposed provides quantum-kinetic description tunneling, miniband transport, hopping, extraction within drift-diffusion-friendly framework. The connection theories allows exploration possibilities offered Poisson-Schr\"odinger or localization landscape drift-diffusion approaches.