Model for self-consistent analysis of arbitrary MQW structures

TL;DR

This paper presents a comprehensive self-consistent model for analyzing complex semiconductor heterostructures, enabling improved design and optimization of MQW-based lasers and amplifiers for advanced photonic systems.

Contribution

The paper introduces a versatile coupled Schrödinger-Poisson-drift-diffusion model for accurate analysis and optimization of doped MQW structures under various conditions, addressing previous methodological inaccuracies.

Findings

The model accurately predicts energy levels and wave functions in MQW structures.

Application examples demonstrate the model's effectiveness in structure optimization.

Design recommendations improve parameter control in semiconductor laser structures.

Abstract

Self-consistent computations of the potential profile in complex semiconductor heterostructures can be successfully applied for comprehensive simulation of the gain and the absorption spectra, for the analysis of the capture, escape, tunneling, recombination, and relaxation phenomena and as a consequence it can be used for studying dynamical behavior of semiconductor lasers and amplifiers. However, many authors use non-entirely correct ways for the application of the method. In this paper the versatile model is proposed for the investigation, optimization, and the control of parameters of the semiconductor lasers and optical amplifiers which may be employed for the creation of new generations of the high-density photonic systems for the information processing and data transfer, follower and security arrangements. The model is based on the coupled Schredinger, Poisson and drift-diffusion equations which allow to determine energy quantization levels and wave functions of charge carriers, take into account built-in fields, and to investigate doped MQW structures and those under external electric fields influence. In the paper the methodology of computer realization based on our model is described. Boundary conditions for each equation and consideration of the convergence for the method are included. Frequently encountered in practice approaches and errors of self-consistent computations are described. Domains of applicability of the main approaches are estimated. Application examples of the method are given. Some of regularities of the results which were discovered by using self-consistent method are discussed. Design recommendations for structure optimization in respect to managing some parameters of AMQW structures are given.