Charging dynamics in electrically pumped quantum wells

Ada Bäumner; Mackillo Kira; Stephan W. Koch

doi:10.1109/JQE.2009.2017281

Charging dynamics in electrically pumped quantum wells

Ada Bäumner, Mackillo Kira, Stephan W. Koch

Optical Sciences, College of

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Injection pumping of quantum-well (QW) lasers can lead to charging of the active region due to the different electron and hole masses. To investigate the significance and physical consequences of this effect, the consequences of electrical pumping and the associated charging phenomena are investigated microscopically. The analysis reveals the necessity to include the extended barrier states energetically above the band edge in addition to the quantum-confined well states. It is shown that the barrier-state populations compensate the QW charging. The replenishing of stimulated carrier recombination under CW laser operation causes persistent charge oscillations at the plasma frequency.

Original language	English (US)
Pages (from-to)	1024-1032
Number of pages	9
Journal	IEEE Journal of Quantum Electronics
Volume	45
Issue number	8
DOIs	https://doi.org/10.1109/JQE.2009.2017281
State	Published - Dec 1 2009

Keywords

Charge carrier processes
Plasma oscillations
Quantum well lasers
Semiconductor device modeling

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

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abstract = "Injection pumping of quantum-well (QW) lasers can lead to charging of the active region due to the different electron and hole masses. To investigate the significance and physical consequences of this effect, the consequences of electrical pumping and the associated charging phenomena are investigated microscopically. The analysis reveals the necessity to include the extended barrier states energetically above the band edge in addition to the quantum-confined well states. It is shown that the barrier-state populations compensate the QW charging. The replenishing of stimulated carrier recombination under CW laser operation causes persistent charge oscillations at the plasma frequency.",

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AB - Injection pumping of quantum-well (QW) lasers can lead to charging of the active region due to the different electron and hole masses. To investigate the significance and physical consequences of this effect, the consequences of electrical pumping and the associated charging phenomena are investigated microscopically. The analysis reveals the necessity to include the extended barrier states energetically above the band edge in addition to the quantum-confined well states. It is shown that the barrier-state populations compensate the QW charging. The replenishing of stimulated carrier recombination under CW laser operation causes persistent charge oscillations at the plasma frequency.

KW - Charge carrier processes

KW - Plasma oscillations

KW - Quantum well lasers

KW - Semiconductor device modeling

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