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Optical Study Of Wide Gaas Aigaas Quantum Wells Containing A Two Dimensional Electron Gas
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Book Synopsis Optical Study of Wide GaAs/AIGaAs Quantum Wells Containing a Two Dimensional Electron Gas by : Polina Svidovsky
Download or read book Optical Study of Wide GaAs/AIGaAs Quantum Wells Containing a Two Dimensional Electron Gas written by Polina Svidovsky and published by . This book was released on 2009 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optical Studies of Two-dimensional Hole and Electron Gases in Intrinsic GaAs Quantum Wells by : Shmuel Glasberg
Download or read book Optical Studies of Two-dimensional Hole and Electron Gases in Intrinsic GaAs Quantum Wells written by Shmuel Glasberg and published by . This book was released on 2001 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physics and Applications of Quantum Wells and Superlattices by : E.E. Mendez
Download or read book Physics and Applications of Quantum Wells and Superlattices written by E.E. Mendez and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the lectures delivered at the NATO Advanced Study Institute on "Physics and Applications of Quantum Wells and Superlattices", held in Erice, Italy, on April 21-May 1, 1987. This course was the fourth one of the International School of Solid-State Device Research, which is under the auspices of the Ettore Majorana Center for Scientific Culture. In the last ten years, we have seen an enormous increase in re search in the field of Semiconductor Heterostructures, as evidenced by the large percentage of papers presented in recent international conferences on semiconductor physics. Undoubtfully, this expansion has been made possible by dramatic advances in materials preparation, mostly by molecular beam epitaxy and organometallic chemical vapor deposition. The emphasis on epitaxial growth that was prevalent at the beginning of the decade (thus, the second course of the School, held in 1983, was devoted to Molecular Beam Epitaxy and Heterostructures) has given way to a strong interest in new physical phenomena and new material structures, and to practical applications that are already emerging from them.
Book Synopsis Photon Drag Spectroscopy of the Two-dimensional Electron Gas in GaAs/AlGaAs Quantum Well Systems by :
Download or read book Photon Drag Spectroscopy of the Two-dimensional Electron Gas in GaAs/AlGaAs Quantum Well Systems written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 1248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Electron-hole Friction in an N-doped GaAs/AlGaAs Quantum Well Using Optical Transient-grating Spectroscopy by :
Download or read book Measurement of Electron-hole Friction in an N-doped GaAs/AlGaAs Quantum Well Using Optical Transient-grating Spectroscopy written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We use phase-resolved transient grating spectroscopy to measure the drift and diffusion of electron-hole density waves in a semiconductor quantum well. The unique aspects of this optical probe allow us to determine the frictional force between a two-dimensional Fermi liquid of electrons and a dilute gas of holes. Knowledge of electron-hole friction enables prediction of ambipolar dynamics in high-mobility electron systems.
Book Synopsis Photon Drag Spectroscopy of the Two-dimensional Electron Gas in GaAs/AlGaAs Quantum Well Systems by : Stephan Graf (Physiker.)
Download or read book Photon Drag Spectroscopy of the Two-dimensional Electron Gas in GaAs/AlGaAs Quantum Well Systems written by Stephan Graf (Physiker.) and published by . This book was released on 2000 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Intersubband Transitions in Quantum Wells by : Emmanuel Rosencher
Download or read book Intersubband Transitions in Quantum Wells written by Emmanuel Rosencher and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the lectures delivered at the NATO Advanced Research Workshop on the "Intersubband Transistions in Quantum Wells" held in Cargese, France, between the t 9 h and the 14th of September 1991. The urge for this Workshop was justified by the impressive growth of work dealing with this subject during the last two or three years. Indeed, thanks to recent progresses of epitaxial growth techniques, such as Molecular Beam Epitaxy, it is now possible to realize semiconductor layers ( e.g. GaAs) with thicknesses controlled within one atomic layer, sandwiched between insulating layers (e.g. AlGaAs). When the semiconducting layer is very thin, i.e. less than 15 nm, the energy of the carriers corresponding to their motion perpendicular to these layers is quantized, forming subbands of allowed energies. Because of the low effective masses in these semiconducting materials, the oscillator strengths corresponding to intersubband transitions are extremely large and quantum optical effects become giant in the 5 - 20 ~ range: photoionization, optical nonlinearities, ... Moreover, a great theoretical surprise is that - thanks to the robustness of the effective mass theory - these quantum wells are a real life materialization of our old text book one-dimensional quantum well ideal. Complex physical phenomena may then be investigated on a simple model system.
Book Synopsis Optical Spectroscopy of Interacting Two-dimensional Electron Systems in Semiconductor Quantum Wells by : Ziyu Liu
Download or read book Optical Spectroscopy of Interacting Two-dimensional Electron Systems in Semiconductor Quantum Wells written by Ziyu Liu and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results offer the first experimental evidence of geometrical degrees of freedom in the fractional quantum Hall effect.
Book Synopsis The Physics and Fabrication of Microstructures and Microdevices by : Michael J. Kelly
Download or read book The Physics and Fabrication of Microstructures and Microdevices written by Michael J. Kelly and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: les Houches This Winter School on "The Physics and Fabrication of Microstructures" originated with a European industrial decision to investigate in some detail the potential of custom-designed microstructures for new devices. Beginning in 1985, GEC and THOMSON started a collaboration on these subjects, supported by an ESPRIT grant from the Commission of the European Com munity. To the outside observer of the whole field, it appears clear that the world effort is very largely based in the United States and Japan. It also appears that cooperation and dissemination of results are very well organised outside Europe and act as a major influence on the development of new concepts and devices. In Japan, a main research programme of the Research and Development for Basic Technology for Future Industries is focused on "Future Electron Devices". In Japan and in the United States, many workshops are organised annually in order to bring together the major specialists in industry and academia, allowing fast dissemination of advances and contacts for setting up cooperative efforts.
Book Synopsis Collective Recombination of Two-Dimensional Electron Gas with Bound Holes and Density Dependent Band-Gap Renormalization in Ga InAs/A1IAs Single Quantum Wells by : Y. H. Zhang
Download or read book Collective Recombination of Two-Dimensional Electron Gas with Bound Holes and Density Dependent Band-Gap Renormalization in Ga InAs/A1IAs Single Quantum Wells written by Y. H. Zhang and published by . This book was released on 1992 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the k-conservation restriction the intrinsic luminescence from the two-dimensional electron gas (2DEG) in modulation-doped (MD) quantum wells (QWs) of high structural perfection consists of a sharp peak centered around the band gap instead of a step-like emission band extending up to the Fermi edge as expected. Therefore, in such QWs it is not possible to study the density of states as well as the optical processes involving electrons near the Fermi edge directly by means of photoluminescence (PL) experiments. In order to observe the luminescence involving all occupied electron states below the Fermi edge in the 2DEG, some mechanism has to be introduced to localize photogenerated holes and relax the k-conserving law. Alloy fluctuations may localize the holes in ternary MD QW, but the random character of this localization potential causes some difficulty for reproducible studies.
Book Synopsis Narrow Gap Semiconductors by : Junichiro Kono
Download or read book Narrow Gap Semiconductors written by Junichiro Kono and published by CRC Press. This book was released on 2006-05-25 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume forms a solid presentation in several important areas of NGS research, including materials, growth and characterization, fundamental physical phenomena, and devices and applications. It examines the novel material of InAs and its related alloys, heterostructures, and nanostructures as well as more traditional NGS materials such as InSb, PbTe, and HgCdTe. Several chapters cover carbon nanotubes and spintronics, along with spin-orbit coupling, nonparabolicity, and large g-factors. The book also deals with the physics and applications of low-energy phenomena at the infrared and terahertz ranges.
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantum Wells written by Alfred Ruyter and published by Nova Science Pub Incorporated. This book was released on 2009 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Properties of quantum-well(QW) structures have proved useful in providing enhanced device characteristics and even in generating new device applications. This book presents a theory needed to understand the properties of QW structures, as well as the rules employed in the design of photodetectors based on QWs. A theoretical model is presented evaluating gain from the QW structure based on IV-VI semiconductor materials. The experimental and theoretical results concerning coupled QW structures are discussed. Semimagnetic quantum wells attract great attention due to potential device application in the field of spintronics. A study of three groups of semimagnetic structures is presented. Magnetoexcitons dispersion in coupled quantum wells are discussed using the Bethe-Salpeter formalism. Also presented are: high-resolution electron energy loss spectroscopy measurements on surface plasmon dispersion in systems exhibiting quantum well states; a review of different ways to achieve a spin splitting of two-dimensional electron and hole sub-bands; a review of two approaches to the quantisation of the particle motion in an infinite square; a study of the different disordered electron systems with various disorder strengths; and a study of quantum states of Double Quantum Wells and hydrogen-like molecules. An optical gain using the new material system InGaAsN for the operation of QW based semiconductor lasers is evaluated as well.
Book Synopsis Breakdown of the Quantum Hall Effect in InGaAs/InP Quantum Wells by : Victor Yu
Download or read book Breakdown of the Quantum Hall Effect in InGaAs/InP Quantum Wells written by Victor Yu and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The quantum Hall effect occurs in a two-dimensional electron gas confined in a quantum well when subjected to a high perpendicular magnetic field. By passing a sufficiently high current through a Hall bar, the quantum Hall effect can be destroyed. A rich variety of non-linear phenomena can be accessed at and beyond current-induced quantum Hall breakdown. One example is hysteresis arising from dynamic nuclear polarization through the interplay of electron and nuclear spins via the hyperfine interaction. Another example is electric instability leading to resistance fluctuations and negative differential resistance. These phenomena are typically observed in widely studied GaAs/AlGaAs heterostructure quantum well Hall bar devices. We report on the characteristics of hysteresis and electric instability seen at and beyond quantum Hall breakdown in InGaAs/InP quantum well Hall bar devices. Such indium-based quantum wells are of current interest for spintronic applications. As compared to widely employed GaAs/AlGaAs quantum wells, InGaAs/InP quantum wells offer larger electron g-factors, stronger spin-orbit coupling, and the nuclear spin for indium (9/2) is larger than for gallium (3/2). We investigate non-linear magnetotransport in three long (200-300 um) and narrow (15 um) Hall bar devices made from a strained InGaAs/InP quantum well and can change the electron sheet density by careful illumination. Two-dimensional maps of voltage or resistance as a function of current and magnetic field are generated. These maps may be regarded as phase diagrams since they provide a wealth of information about the conditions for quantum Hall breakdown, hysteresis, electric instability, and a number of other phenomena. We document extensively how the quantum Hall breakdown and non-linear phenomena evolve systematically not only with increasing magnetic field but also with increasing electron sheet density. Regarding the hysteresis, we find that it is pronounced when spin-polarized quantum Hall states break down. The hysteresis is accompanied by slow change of measured signal on timescales of a few minutes or even a few hours. We examine whether the observed hysteresis and time dependent behaviour are consistent with a picture of dynamic nuclear polarization or if it has its origin elsewhere. Regarding the electric instability, it becomes prevalent at high current over a wide range of magnetic field at high electron sheet density when the differential resistance along the Hall bar device approaches zero or becomes negative. Our observations may provide insight into the formation of domains within the Hall bar that carry different currents, and turbulent electron flow." --
Book Synopsis Two-Dimensional Systems, Heterostructures, and Superlattices by : G. Bauer
Download or read book Two-Dimensional Systems, Heterostructures, and Superlattices written by G. Bauer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the International Winter School on "Heterostructures and Two-Dimensional Electronic Systems in Semiconductors". The school took place in Mauterndorf, Austria, from February 26 - March 2, 1984, and was the third one in a series of winter schools on "New Develop ments in Solid-State Physics", organized by the Austrian Physical Society, Solid State Physics Division. The school was attended by about 150 scientists from 12 countries, including the United States of America, Japan and Poland. Most of the research groups of Western Europe working in this field participated and demonstrated the still increasing interest in the topics. These topics cover the wide area ranging from fundamental phenomena in solid-state physics, like the quantum Hall effect, to new semiconductor devices, all based on two-dimensional elec tronic systems. We hope that the spirit of this school, the combination of basic and applied physics (including skiing) will stimulate further progress in this field of research. This conference was sponsored by the Austrian Physical Society, Austrian Federal Ministry for Science and Research, European Research Office of the US Army, European Office of Aerospace Research and Development, Federal Province of Salzburg, and Osterreichische Forschungsgemeinschaft Further financial support came from the following companies: Balzers, IBM Austria, Messer-Griesheim, Oxford Instruments, Klaus Schafer & Co., Siemens Osterreich and Varian.
Book Synopsis Optical Properties in Semiconductor Quantum Wells by : Takeshi Uenoyama
Download or read book Optical Properties in Semiconductor Quantum Wells written by Takeshi Uenoyama and published by . This book was released on 1990 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
