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Software Design for Modeling Quantum Cascade Lasers and Long Wavelength (~16μm) GaAs/AlGaAs Quantum Cascade Lasers.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Software Design for Modeling Quantum Cascade Lasers and Long Wavelength (~16μm) GaAs/AlGaAs Quantum Cascade Lasers./
Author:	Lyu, Ming.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
Description:	155 p.
Notes:	Source: Dissertations Abstracts International, Volume: 83-04, Section: B.
Contained By:	Dissertations Abstracts International83-04B.
Subject:	Electrical engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28540007
ISBN:	9798471106444

Software Design for Modeling Quantum Cascade Lasers and Long Wavelength (~16μm) GaAs/AlGaAs Quantum Cascade Lasers.
Lyu, Ming.

Software Design for Modeling Quantum Cascade Lasers and Long Wavelength (~16μm) GaAs/AlGaAs Quantum Cascade Lasers. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 155 p.

Source: Dissertations Abstracts International, Volume: 83-04, Section: B.

Thesis (Ph.D.)--Princeton University, 2021.

This item must not be sold to any third party vendors.

This thesis reviews the modeling techniques for mid-infrared quantum cascade lasers based on III/V materials, clarifies or corrects ambiguity concepts such as state-dependent effective mass, the non-parabolic kinetic energy and its modeling, and the polarized waveguide confinement in the mathematical perturbation sense. These models are summarized with consistent notation and provide a solid background for developing new quantum cascade devices.The theory is integrated into our work on developing user-friendly software for designing and modeling quantum cascade lasers. We utilize state-of-the-art open-source platforms to construct a development environment that will keep the software both scientifically correct and software engineeringly maintainable. The software performance and the numerical error are also analyzed in this work.Experimentally we present a new 16μm GaAs/AlGaAs quantum cascade laser design with bound-to-bound transition andstrongly coupled upper and injection states. For the waveguide, we propose to utilize AlxGa1-xAs layers of high Al concentration (x=70%) for the cladding layer, which strongly reduces the waveguide loss compared to previous attempts with high-doped GaAs.With the experimental demonstration, we summarize our work on developing fabrication recipes for GaAs-based quantum cascade lasers and the measurement platform for long-wavelength infrared optics.The new design is shown to have a threshold current density smaller than the record of GaAs/AlGaAs-based quantum cascade lasers of similar wavelength --- an improvement by 50% --- and the spectrum matches exactly the designed wavelength.

ISBN: 9798471106444Subjects--Topical Terms:

649834
Electrical engineering.
Subjects--Index Terms:

GaAs

Software Design for Modeling Quantum Cascade Lasers and Long Wavelength (~16μm) GaAs/AlGaAs Quantum Cascade Lasers.
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506 $a This item must not be sold to any third party vendors.
520 $a This thesis reviews the modeling techniques for mid-infrared quantum cascade lasers based on III/V materials, clarifies or corrects ambiguity concepts such as state-dependent effective mass, the non-parabolic kinetic energy and its modeling, and the polarized waveguide confinement in the mathematical perturbation sense. These models are summarized with consistent notation and provide a solid background for developing new quantum cascade devices.The theory is integrated into our work on developing user-friendly software for designing and modeling quantum cascade lasers. We utilize state-of-the-art open-source platforms to construct a development environment that will keep the software both scientifically correct and software engineeringly maintainable. The software performance and the numerical error are also analyzed in this work.Experimentally we present a new 16μm GaAs/AlGaAs quantum cascade laser design with bound-to-bound transition andstrongly coupled upper and injection states. For the waveguide, we propose to utilize AlxGa1-xAs layers of high Al concentration (x=70%) for the cladding layer, which strongly reduces the waveguide loss compared to previous attempts with high-doped GaAs.With the experimental demonstration, we summarize our work on developing fabrication recipes for GaAs-based quantum cascade lasers and the measurement platform for long-wavelength infrared optics.The new design is shown to have a threshold current density smaller than the record of GaAs/AlGaAs-based quantum cascade lasers of similar wavelength --- an improvement by 50% --- and the spectrum matches exactly the designed wavelength.
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