Paper
11 May 2012 Carrier escape from ground state and non-zero resonance frequency at low bias powers for semiconductor quantum-dot lasers
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Abstract
The three-dimensional confinement of electrons and holes in the semiconductor quantum dot (QD) structure profoundly changes its density of states compared to the bulk semiconductor or the thin-film quantum well (QW) structure. The aim of this paper is to theoretically investigate the microwave properties of InAs/InP(311B) QD lasers. A new expression of the modulation transfer function is derived for the analysis of QD laser modulation properties based on a set of four rate equations. Analytical calculations point out that carrier escape from ground state (GS) to excited state (ES) induces a non-zero resonance frequency at low bias powers. Calculations also show that the carrier escape leads to a larger damping factor offset as compared to conventional QW lasers. These results are of prime importance for a better understanding of the carrier dynamics in QD lasers as well as for further optimization of low cost sources for optical telecommunications.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
C. Wang, F. Grillot, and J. Even "Carrier escape from ground state and non-zero resonance frequency at low bias powers for semiconductor quantum-dot lasers", Proc. SPIE 8432, Semiconductor Lasers and Laser Dynamics V, 843225 (11 May 2012); https://doi.org/10.1117/12.946053
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KEYWORDS
Modulation

Quantum wells

Semiconductor lasers

Semiconductors

Carrier dynamics

Picosecond phenomena

Surface plasmons

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