Coherence and Spatial Resolution of Transport in Quantum Cascade Lasers

Abstract

The method of nonequilibrium Greens functions allows for a spatial and energetical resolution of the electron current in Quantum Cascade Lasers. While scattering does not change the spatial position of carriers, the entire spatial evolution of charge can be attributed to coherent transport by complex wave functions. We discuss the hierarchy of transport models and derive the density matrix equations as well as the hopping model starting from the nonequilibrium Greens functions approach.

6 pages, figures included, submitted to Proceedings of HCIS-15, physica status solidi (c)

References in corpus (9)

• Semiconductor Superlattices: A model system for nonlinear transport
• Nonequilibrium Green's function theory for transport and gain properties of quantum cascade structures
• On the Nature of Charge Transport in Quantum-Cascade Lasers
• Quantum-mechanical wavepacket transport in quantum cascade laser structures
• Self-Consistent Theory of the Gain Linewidth for Quantum Cascade Lasers
• Coherent Transport through an interacting double quantum dot: Beyond sequential tunneling
• Quantum-transport theory for semiconductor nanostructures: A density-matrix formulation
• Comparative analysis of resonant phonon THz quantum cascade lasers
• Quantum Fermi's Golden Rule

Cited by in corpus (4)

• Density-matrix theory of the optical dynamics and transport in quantum cascade structures: The role of coherence
• Density Matrix Modeling of Quantum Cascade Lasers without an Artificially Localized Basis: A Generalized Scattering Approach
• Low Rank Approximation Method for Efficient Green's Function Calculation of Dissipative Quantum Transport
• Transport Electronique Dans Les Super Reseaux : Applications Aux Détecteurs Infrarouges à Grandes Longueur D'onde