Mid Infrared Emitting Quantum Cascade Lasers On Metamorphic Buffer Layers
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Mid Infrared Emitting Quantum Cascade Lasers On Metamorphic Buffer Layers
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Author : Ayushi Rajeev
language : en
Publisher:
Release Date : 2019
Mid Infrared Emitting Quantum Cascade Lasers On Metamorphic Buffer Layers written by Ayushi Rajeev and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
When using conventional substrates, such as InP and GaAs, the materials constituting the superlattice (SL) core region of the quantum cascade laser (QCL) are constrained by strain-induced critical-thickness limitations. Metamorphic buffer layers (MBLs) can serve as "virtual substrates" with a designer-chosen surface lattice constant, thus expanding the compositional-design space for a variety of device structures, including short-wavelength QCLs. An optimized short-wavelength (3.4 [mu]m) single-phonon-resonant (SPR)+ miniband extraction QCL design, grown on an [InxGa1-xAs] MBL, is presented along with the optical and thermal device considerations in play. MBLs can be grown with a variety of graded regions such as linear composition grade from GaAs to [InxGa1-xAs] or by employing dislocation filters between Si substrate and InP. QCL and test superlattices' regrowth on these MBLs with the corresponding materials and device analysis, is presented in this work. In addition to the materials limitation for the design of QCL devices, the requirement to have the constituent layers (1-5 nm) to be precisely controlled in the various compositions and thicknesses, is a challenge. Interfacial grading in strained SLs is studied via atom probe tomography for SLs with various layer thicknesses and relative lattice strains. The tip reconstructions are analyzed by fitting the interfaces to diffusion profiles. Mechanisms possible for the observed interdiffusion profile, such as surface segregation and/or bulk diffusion, are discussed. With an understanding of the compositional gradient at the interfaces, together with optimized QCL designs and regrowth on the MBLs, short-wavelength QCLs with high performances can be achieved
Heteroepitaxy Of Semiconductors
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Author : John E. Ayers
language : en
Publisher: CRC Press
Release Date : 2016-10-03
Heteroepitaxy Of Semiconductors written by John E. Ayers and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-10-03 with Technology & Engineering categories.
In the past ten years, heteroepitaxy has continued to increase in importance with the explosive growth of the electronics industry and the development of a myriad of heteroepitaxial devices for solid state lighting, green energy, displays, communications, and digital computing. Our ever-growing understanding of the basic physics and chemistry underlying heteroepitaxy, especially lattice relaxation and dislocation dynamic, has enabled an ever-increasing emphasis on metamorphic devices. To reflect this focus, two all-new chapters have been included in this new edition. One chapter addresses metamorphic buffer layers, and the other covers metamorphic devices. The remaining seven chapters have been revised extensively with new material on crystal symmetry and relationships, III-nitride materials, lattice relaxation physics and models, in-situ characterization, and reciprocal space maps.
Mid Infrared Optoelectronics
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Author : Eric Tournié
language : en
Publisher: Woodhead Publishing
Release Date : 2019-10-19
Mid Infrared Optoelectronics written by Eric Tournié and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-10-19 with Technology & Engineering categories.
Mid-infrared Optoelectronics: Materials, Devices, and Applications addresses the new materials, devices and applications that have emerged over the last decade, along with exciting areas of research. Sections cover fundamentals, light sources, photodetectors, new approaches, and the application of mid-IR devices, with sections discussing LEDs, laser diodes, and quantum cascade lasers, mid-infrared optoelectronics, emerging research areas, dilute bismide and nitride alloys, Group-IV materials, gallium nitride heterostructures, and new nonlinear materials. Finally, the most relevant applications of mid-infrared devices are reviewed in industry, gas sensing, spectroscopy, and imaging. This book presents a key reference for materials scientists, engineers and professionals working in R&D in the area of semiconductors and optoelectronics. Provides a comprehensive overview of mid-infrared photodetectors and light sources and the latest materials and devices Reviews emerging areas of research in the field of mid-infrared optoelectronics, including new materials, such as wide bandgap materials, chalcogenides and new approaches, like heterogeneous integration Includes information on the most relevant applications in industry, like gas sensing, spectroscopy and imaging
Iccge 19 Omvpe 19 Program And Abstracts Ebook
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Author : ICCGE-19/OMVPE-19/AACG
language : en
Publisher: CTI Meeting Technology
Release Date : 2019-07-11
Iccge 19 Omvpe 19 Program And Abstracts Ebook written by ICCGE-19/OMVPE-19/AACG and has been published by CTI Meeting Technology this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-07-11 with Medical categories.
A collection of abstracts for the 19th International Conference on Crystal Growth and Epitaxy (ICCGE-19) to be held jointly with the 19th US Biennial Workshop on Organometallic Vapor Phase Epitaxy (OMVPE-19) and the 17th International Summer School on Crystal Growth (ISSCG-17).
Nonlinear Photonics In Mid Infrared Quantum Cascade Lasers
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Author : Louise Jumpertz
language : en
Publisher: Springer
Release Date : 2017-08-31
Nonlinear Photonics In Mid Infrared Quantum Cascade Lasers written by Louise Jumpertz and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-08-31 with Science categories.
This thesis presents the first comprehensive analysis of quantum cascade laser nonlinear dynamics and includes the first observation of a temporal chaotic behavior in quantum cascade lasers. It also provides the first analysis of optical instabilities in the mid-infrared range. Mid-infrared quantum cascade lasers are unipolar semiconductor lasers, which have become widely used in applications such as gas spectroscopy, free-space communications or optical countermeasures. Applying external perturbations such as optical feedback or optical injection leads to a strong modification of the quantum cascade laser properties. Optical feedback impacts the static properties of mid-infrared Fabry–Perot and distributed feedback quantum cascade lasers, inducing power increase; threshold reduction; modification of the optical spectrum, which can become either single- or multimode; and enhanced beam quality in broad-area transverse multimode lasers. It also leads to a different dynamical behavior, and a quantum cascade laser subject to optical feedback can oscillate periodically or even become chaotic. A quantum cascade laser under external control could therefore be a source with enhanced properties for the usual mid-infrared applications, but could also address new applications such as tunable photonic oscillators, extreme events generators, chaotic Light Detection and Ranging (LIDAR), chaos-based secured communications or unpredictable countermeasures.
Mid Infrared Coherent Sources And Applications
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Author : Majid Ebrahim-Zadeh
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-01-02
Mid Infrared Coherent Sources And Applications written by Majid Ebrahim-Zadeh and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-01-02 with Science categories.
Covering fundamental principles and the state of the art, this is a collection of reviews from experts in mid-infrared (mid-IR) coherent sources. Among the sources covered are optical parametric oscillators, difference frequency generators, and the most recent broadband crystalline, quantum cascade, and fiber lasers. The authors show how advances in mid-IR science and technology make these sources indispensable for a variety of applications.
Mid Infrared Quantum Cascade Lasers For Chaos Secure Communications
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Author : Olivier Spitz
language : en
Publisher: Springer Nature
Release Date : 2021-05-15
Mid Infrared Quantum Cascade Lasers For Chaos Secure Communications written by Olivier Spitz and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-05-15 with Science categories.
The mid-infrared domain is a promising optical domain because it holds two transparency atmospheric windows, as well as the fingerprint of many chemical compounds. Quantum cascade lasers (QCLs) are one of the available sources in this domain and have already been proven useful for spectroscopic applications and free-space communications. This thesis demonstrates how to implement a private free-space communication relying on mid-infrared optical chaos and this requires an accurate cartography of non-linear phenomena in quantum cascade lasers. This private transmission is made possible by the chaos synchronization of two twin QCLs. Chaos in QCLs can be generated under optical injection or external optical feedback. Depending on the parameters of the optical feedback, QCLs can exhibit several non-linear phenomena in addition to chaos. Similarities exist between QCLs and laser diodes when the chaotic dropouts are synchronized with an external modulation, and this effect is known as the entrainment phenomenon. With a cross-polarization reinjection technique, QCLs can generate all-optical square-waves. Eventually, it is possible to trigger optical extreme events in QCLs with tilted optical feedback. All these experimental results allow a better understanding of the non-linear dynamics of QCLs and will extend the potential applications of this kind of semiconductor lasers.
Quantum Cascade Lasers
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Author : Jérôme Faist
language : en
Publisher: Oxford University Press
Release Date : 2013-03-14
Quantum Cascade Lasers written by Jérôme Faist and has been published by Oxford University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-14 with Science categories.
This book describes the physics, fabrication technology, and applications of the quantum cascade laser.
Long Wavelength Infrared Emitters Based On Quantum Wells And Superlattices
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Author : Manfred Helm
language : en
Publisher: CRC Press
Release Date : 2000-10-31
Long Wavelength Infrared Emitters Based On Quantum Wells And Superlattices written by Manfred Helm and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-10-31 with Technology & Engineering categories.
This book offers a thorough survey of long wavelength infrared semiconductor emitters based primarily on quantum wells and superlattices. Featuring contributions from the most prominent researchers in the field, this volume allows readers to compare different types of lasers as well as examine investigations of potential far-infrared/terrahertz sources. This is an essential reference for researchers, engineers and graduate students who wish to obtain comprehensive knowledge about infrared semiconductor sources and recent developments in this field.
Chemical Abstracts
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Author :
language : en
Publisher:
Release Date : 2002
Chemical Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Chemistry categories.