19 April 1996 Modeling of multiple quantum well lasers and study of the coupling effects between wells
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Abstract
The coupling effects between quantum wells (QWs) on the small-signal response of unstrained multiple QWs (MQWs) are studied theoretically in a two-band-model approximation. A finite- well model and flat-band conditions were assumed. For any barrier thickness between QWs the gain spectrum showed many peaks located at heavy-hole and light-hole transitions. Therefore, the lasers under investigation are being treated as multiple-level systems. It has been shown that the dependence of this peak is a function of the barrier thickness. The traditional rate equations were reformulated and solved for the intensity modulation response. Results and discussion for the characteristics referred above of a GaInAsP-InP double quantum well laser are presented as a specific example. We conclude that, in contrast to the common belief, the coupling effects can enhance the modulation characteristics under certain conditions.
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Alberto de Deus Sarmento, "Modeling of multiple quantum well lasers and study of the coupling effects between wells", Proc. SPIE 2694, Quantum Well and Superlattice Physics VI, (19 April 1996); doi: 10.1117/12.238404; https://doi.org/10.1117/12.238404
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