Download or read book Electronic Optical and Lattice Properties of Superlattices and Heterostructures written by Hanyou Chu and published by . This book was released on 1989 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using an envelope function model, we have calculated the valence band structures in quantum wells and superlattices. It is found that the valence bands exhibit very complicated structures. With the newly devised method and the aid of the CRAY supercomputer, we have been able to calculate the optical absorption spectra for a number of GaAs-Ga$sb{1-x}$Al$sb{x}$As superlattices and quantum wells with the valence band mixing included. The results which feature the saddle point exciton resonances in superlattices are in good agreement with the experimental data. The continuum model (recently confirmed by microscopic calculations) shows that, for GaAs-AlAs superlattices, there exist a number of interface and angle-dependent long-wavelength optical modes. To better understand these properties, we developed a simple microscopic model which helps understand these novel features both qualitatively and quantitatively. This also enables us to obtain the phonon-polariton dispersion curves in superlattices with spatial dispersion included.
Download or read book Superlattices and Other Heterostructures written by Eougenious L. Ivchenko and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superlattices and Other Heterostructures deals with the optical properties of superlattices and quantum well structures with emphasis on phenomena governed by crystal symmetries. After a brief introduction to group theory and symmetries, methods for calculating spectra of electrons, excitons, and phonons in heterostructures are discussed. Further chapters cover absorption and reflection of light under interband transitions, cyclotron and electron spin-resonance, light scattering by free and bound carriers as well as by optical and acoustic phonons, polarized photoluminescence, optical spin orientation of electrons and excitons, and nonlinear optical and photogalvanic effects.
Download or read book Heterojunctions and Semiconductor Superlattices written by Guy Allan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Winter School held in Les Houches on March 12-21, 1985 was devoted to Semiconductor Heterojunctions and Superlattices, a topic which is recognized as being now one of the most interesting and active fields in semiconductor physics. In fact, following the pioneering work of Esaki and Tsu in 1970, the study of these two-dimensional semiconductor heterostructures has developed rapidly, both from the point of view of basic physics and of applications. For instance, modulation-doped heterojunctions are nowadays currently used to investigate the quantum Hall effect and to make very fast transistors. This book contains the lectures presented at this Winter School, showing in particular that many aspects of semiconductor heterojunctions and super lattices were treated, extending from the fabrication of these two-dimensional systems to their basic properties and applications in micro-and opto-electron ics. Among the subjects which were covered, one can quote as examples: molecular beam epitaxy and metallorganic chemical vapor deposition of semi conductor compounds; band structure of superlattices; properties of elec trons in heterojunctions, including the fractional quantum Hall effect; opti cal properties of two-dimensional heterostructures; quantum well lasers; and two-dimensional electron gas field effect transistors. It is clear that two-dimensional semiconductor systems are raising a great deal of interest in many industrial and university laboratories. From the number of applications which were received and from the reactions of the participants, it can certainly be asserted that this School corresponded to a need and came at the right time.
Download or read book Electronic and Optical Properties of Semiconductors written by Lok C. Lew Yan Voon and published by Universal-Publishers. This book was released on 1997-08 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study is a theoretical investigation of the electronic and optical properties of intrinsic semiconductors using the orthogonal empirical tight binding model. An analysis of the bulk properties of semiconductors with the zincblende, diamond and rocksalt structures has been carried out. We have extended the work of others to higher order in the interaction integrals and derived new parameter sets for certain semiconductors which better fit the experimental data over the Brillouin zone. The Hamiltonian of the heterostructures is built up layer by layer from the parameters of the bulk constituents. The second part of this work examines a number of applications of the theory. We present a new microscopic derivation of the intervalley deformation potentials within the tight binding representation and computes a number of conduction-band deformation potentials of bulk semiconductors. We have also studied the electronic states in heterostructures and have shown theoretically the possibility of having barrier localization of above-barrier states in a multivalley heterostructure using a multiband calculation. Another result is the proposal for a new "type-II" lasing mechanism in short-period GaAs/AlAs superlattices. As for our work on the optical properties, a new formalism, based on the generalized Feynman-Hellmann theorem, for computing interband optical matrix elements has been obtained and has been used to compute the linear and second-order nonlinear optical properties of a number of bulk semiconductors and semiconductor heterostructures. In agreement with the one-band elective mass calculations of other groups, our more elaborate calculations show that the intersubband oscillator strengths of quantum wells can be greatly enhanced over the bulk interband values.
Download or read book Semiconductor Superlattices and Interfaces written by A. Stella and published by Elsevier. This book was released on 2013-10-22 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is concerned with the dynamic field of semiconductor microstructures and interfaces. Several topics in the fundamental properties of interfaces, superlattices and quantum wells are included, as are papers on growth techniques and applications. The papers deal with the interaction of theory, experiments and applications within the field, and the outstanding contributions are from both the academic and industrial worlds.
Download or read book GaAs and Related Materials written by Sadao Adachi and published by World Scientific. This book was released on 1994 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the various material properties of bulk GaAs and related materials, and aspects of the physics of artificial semiconductor microstructures, such as quantum wells and superlattices, made of these materials. A complete set of the material properties are considered in this book. They are structural properties; thermal properties; elastic and lattice vibronic properties; collective effects and some response characteristics; electronic energy-band structure and consequences; optical, elasto-optic, and electro-optic properties; and carrier transport properties. This book attempts to summarize, in graphical and tabular forms, most of the important theoretical and experimental results on these material properties. It contains a large number of references useful for further study. Timely topics are discussed as well. This book will be of interest to graduate students, scientists and engineers working on semiconductors.
Download or read book Optical and Electronic Properties of Lattice matched and Strained Semiconductor Superlattices written by Karen Jane Moore and published by . This book was released on 1991 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Semiconductor Superlattices Growth And Electronic Properties written by Fernando Agullo-rueda and published by World Scientific. This book was released on 1995-04-17 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book surveys semiconductor superlattices, in particular their growth and electronic properties in an applied electric field perpendicular to the layers. The main developments in this field, which were achieved in the last five to seven years, are summarized. The electronic properties include transport through minibands at low electric field strengths, the Wannier-Stark localization and Bloch oscillations at intermediate electric field strengths, resonant tunneling of electrons and holes between different subbands, and the formation of electric field domains for large carrier densities at high electric field strengths.
Download or read book Properties of III V Quantum Wells and Superlattices written by P. K. Bhattacharya and published by IET. This book was released on 1996 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: A finely-structured, state-of-the-art review on controlled building of atomic-scale mutilayers, where nanometric structures based on III-V semiconductors have attracted particular attention.
Download or read book Properties of Impurity States in Superlattice Semiconductors written by C.Y. Fong and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: A NATO workshop on "The Properties of Impurity States in Semiconductor Superlattices" was held at the University of Essex, Colchester, United Kingdom, from September 7 to 11, 1987. Doped semiconductor superlattices not only provide a unique opportunity for studying low dimensional electronic behavior, they can also be custom-designed to exhibit many other fascinating el~ctronic properties. The possibility of using these materials for new and novel devices has further induced many astonishing advances, especially in recent years. The purpose of this workshop was to review both advances in the state of the art and recent results in various areas of semiconductor superlattice research, including: (i) growth and characterization techniques, (ii) deep and shallow im purity states, (iii) quantum well states, and (iv) two-dimensional conduction and other novel electronic properties. This volume consists of all the papers presented at the workshop. Chapters 1-6 are concerned with growth and characterization techniques for superlattice semiconductors. The question of a-layer is also discussed in this section. Chapters 7-15 contain a discussion of various aspects of the impurity states. Chapters 16- 22 are devoted to quantum well states. Finally, two-dimensional conduction and other electronic properties are described in chapters 23-26.
Download or read book Materials Science and Technology Strained Layer Superlattices written by and published by Academic Press. This book was released on 1991-02-20 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: The following blurb to be used for the AP Report and ATI only as both volumes will not appear together there.****Strained-layer superlattices have been developed as an important new form of semiconducting material with applications in integrated electro-optics and electronics. Edited by a pioneer in the field, Thomas Pearsall, this volume offers a comprehensive discussion of strained-layer superlattices and focuses on fabrication technology and applications of the material. This volume combines with Volume 32, Strained-Layer Superlattices: Physics, in this series to cover a broad spectrum of topics, including molecular beam epitaxy, quantum wells and superlattices, strain-effects in semiconductors, optical and electrical properties of semiconductors, and semiconductor devices.****The following previously approved blurb is to be used in all other direct mail and advertising as both volumes will be promoted together.****Strained-layer superlattices have been developed as an important new form of semiconducting material with applications in integrated electro-optics and electronics. Edited by a pioneer in the field, Thomas Pearsall, this two-volume survey offers a comprehensive discussion of the physics of strained-layer superlattices (Volume 32), as well as detailing fabrication technology and applications of the material (Volume 33). Although each volume is edited to stand alone, the two books combine to cover a broad spectrum of topics, including molecular beam epitaxy, quantum wells and superlattices, strain-effects in semiconductors, optical and electrical properties of semiconductors, and semiconductor devices.
Download or read book Superlattices and Other Heterostructures written by Eougenious L. Ivchenko and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superlattices and Other Heterostructures deals with optical properties of superlattices and quantum-well structures with emphasis on phenomena governed by crystal symmetries. After a brief introduction to group theory and symmetries, methods to calculate spectra of electrons, excitions and phonons in heterostructures are discussed. Further chapters cover absorption and reflection of light under interband transitions, cyclotron and electron spin-resoncance, light scattering by free and bound carriers as well as by optical and acoustic phonons, polarized photoluminescence, optical spin orientation of electrons and excitions, and nonlinear optical and photogalvanic effects.
Download or read book Semiconductor Superlattices written by M. A. Herman and published by Walter de Gruyter GmbH & Co KG. This book was released on 1986-12-31 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: No detailed description available for "Semiconductor Superlattices".
Download or read book Quantum Dot Heterostructures written by Dieter Bimberg and published by John Wiley & Sons. This book was released on 1999-03-17 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Da die Nachfrage nach immer schnelleren und kleineren Halbleiterbauelementen stetig wächst, sind Quanten-Dots und -Pyramiden rasant in den Mittelpunkt der Halbleiterforschung gerückt. Dieses Buch vermittelt einen umfassenden Überblick über den aktuellen Forschungsstand auf diesem Gebiet. Behandelt werden u.a. Fragen, wie Strukturen aufgebaut, wie sie charakterisiert werden und wie sie die Leistungsfähigkeit der Bauelemente bestimmen. (11/98)
Download or read book The Electronic and Optical Properties of HgTe CdTe Superlattices written by Andrew Zoryk and published by . This book was released on 1988 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific Information Bulletin written by and published by . This book was released on 1992 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
