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We present a full-wave Maxwell-density matrix simulation tool includingc-number stochastic noise terms for the modeling of the spatiotemporal dynamicsin active photonic devices, such as quantum cascade lasers (QCLs) and quantumdot (QD) structures. The coherent light-matter interaction in such devicesplays an important role in the generation of frequency combs and othernonlinear and nonclassical optical phenomena. Since the emergence of nonlinearand nonclassical features is directly linked to the noise properties, detailedsimulations of the noise characteristics are required for the development oflow-noise quantum optoelectronic sources. Our semiclassical simulationframework is based on the Lindblad equation for the electron dynamics, coupledwith Maxwell's equations for the optical propagation in the laser waveguide.Fluctuations arising from interactions of the optical field and quantum systemwith their reservoirs are treated within the quantum Langevin theory. Here, thefluctuations are included by adding stochastic c-number terms to theMaxwell-density matrix equations. The implementation in the mbsolve dynamicsimulation framework is publicly available.

Modeling of Fluctuations in Dynamical Optoelectronic Device Simulations within a Maxwell-Density Matrix Langevin Approach