Physics-Based Laser Device Modeling

ACT has developed several tools for modeling the electro-thermal response of semiconductor devices. These tools have been extended to develop a physics-based framework for simulation of Quantum Well (QW) Lasers operating at high power outputs. The approach solves for the hydrodynamic equations of charge transport, heat generation due to electro-thermal coupling, alongside the optical mode solution (based on 1-D time dependent Schrodinger equation). A quantum gain/loss model is used to couple the optical mode solver and the electro-thermal models, resulting in a multiphysics framework for high-fidelity modeling of laser devices.

ACT’s custom framework has been specialized for the case of Bismide doped QW lasers. The material models necessary to describe the semiconductor bands of Bi-doped GaAs (Gallium Arsenide) were developed using ab-initio (density functional theory) computations.  Shown here is a snapshot of the GUI developed by ACT to solve electrical transport equations in the QW laser.

Figure 1. GUI of ACT’s electrical solver of a quantum well laser

Figure 1. GUI of ACT’s electrical solver of a quantum well laser

 

Shown in figure below is a snapshot of the GUI to set-up the surrogate structure of the GaAs based QW laser and simulate the optical modes of the laser in conjunction with interactions with the electro-thermal model (solved above).

Figure 2. GUI of ACT’s optical and Electromagnetic Wave solver of a quantum well laser

Figure 2. GUI of ACT’s optical and Electromagnetic Wave solver of a quantum well laser

 

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