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
| Original language | English |
|---|---|
| Article number | 2500108 |
| Number of pages | 8 |
| Journal | IEEE Journal of Quantum Electronics |
| Volume | 51 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Mar 2015 |
Keywords
- items-Quantum well, transmission line modelling, gain model, semiconductor optical devices, under sampling
ASJC Scopus subject areas
- Engineering(all)
- Mathematics(all)
- Physics and Astronomy(all)