A New Optical Gain Model for Quantum Wells Based on Quantum Well Transmission Line Modelling Method

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Authors

Colleges, School and Institutes

Abstract

This paper presents a new method for modelling the gain spectrum in quantum well structures based on the quantum well transmission line modelling (QW-TLM) method. In the QW-TLM method, three parallel RLC filters together with their associated weight coefficients constitute a QW-TLM unit, which represents the processes that electrons transit from the conduction band to the heavy hole band, the light hole band and the spin-orbit split-off band at a specific wave vector. Parallel QW-TLM units are adopted to describe the electron transitions in the wave vector space. Furthermore, the optical gain model of quantum wells based on the QW-TLM method is presented. The gain spectrum obtained through the QW-TLM method is agreeable with the gain spectrum calculated from the analytical expression in a large wavelength range from to . In order to reduce the computation time, under sampling QW-TLM is proposed to model the gain curve of quantum wells. The simulation result shows that the gain curve obtained from under sampling QW-TLM is consistent with the gain curve obtained through the theoretical derivation from to , which satisfies the requirement of studying the dynamic spectral characteristics of quantum well devices

Details

Original languageEnglish
Article number2500108
Number of pages8
JournalIEEE Journal of Quantum Electronics
Volume51
Issue number3
Publication statusPublished - Mar 2015

Keywords

  • items-Quantum well, transmission line modelling, gain model, semiconductor optical devices, under sampling