The Physics of Low dimensional Semiconductors

The Physics of Low dimensional Semiconductors

Beginning graduate introduction to low-dimensional systems and their applications.

Author: John H. Davies

Publisher: Cambridge University Press

ISBN: 052148491X

Category: Technology & Engineering

Page: 438

View: 641

Beginning graduate introduction to low-dimensional systems and their applications.
Categories: Technology & Engineering

Low dimensional Semiconductors

Low dimensional Semiconductors

... that have dominated semiconductor physics research in the last two decades, namely the concepts associated with low-dimensional systems, i.e. systems that exhibit properties associated with less than three spatial dimensions.

Author: M. J. Kelly

Publisher: Clarendon Press

ISBN: 9780191590092

Category: Science

Page: 564

View: 358

This text is a first attempt to pull together the whole of semiconductor science and technology since 1970 in so far as semiconductor multilayers are concerned. Material, technology, physics and device issues are described with approximately equal emphasis, and form a single coherant point of view. The subject matter is the concern of over half of today's active semiconductor scientists and technologists, the remainder working on bulk semiconductors and devices. It is now routine to design and the prepare semiconductor multilayers at a time, with independent control over the dropping and composition in each layer. In turn these multilayers can be patterned with features that as a small as a few atomic layers in lateral extent. The resulting structures open up many new ares of exciting solid state and quantum physics. They have also led to whole new generations of electronic and optoelectronic devices whose superior performance relates back to the multilayer structures. The principles established in the field have several decades to go, advancing towards the ultimate of materials engineering, the design and preparation of solids atom by atom. The book should appeal equally to physicists, electronic engineers and materials scientists.
Categories: Science

Excitons in Low Dimensional Semiconductors

Excitons in Low Dimensional Semiconductors

Thus, a semiconductor does not need to be “low-dimensional” according to our definition. The term “quantum structures” is more appropriate. Superlattices are sometimes referred to as low-dimensional semiconductors.

Author: Stephan Glutsch

Publisher: Springer Science & Business Media

ISBN: 9783662071502

Category: Science

Page: 298

View: 914

The author develops the effective-mass theory of excitons in low-dimensional semiconductors and describes numerical methods for calculating the optical absorption including Coulomb interaction, geometry, and external fields. The theory is applied to Fano resonances in low-dimensional semiconductors and the Zener breakdown in superlattices. Comparing theoretical results with experiments, the book is essentially self-contained; it is a hands-on approach with detailed derivations, worked examples, illustrative figures, and computer programs. The book is clearly structured and will be valuable as an advanced-level self-study or course book for graduate students, lecturers, and researchers.
Categories: Science

Fabrication Properties and Applications of Low Dimensional Semiconductors

Fabrication  Properties and Applications of Low Dimensional Semiconductors

This result does not only hold for the few examples of III-V semiconductors given in this article, ... The condition for the occurence of new phenomena in these low-dimensional semiconductor structures is that the lateral size of the ...

Author: M. Balkanski

Publisher: Springer Science & Business Media

ISBN: 9789401100892

Category: Technology & Engineering

Page: 457

View: 669

A recent major development in high technology, and one which bears considerable industrial potential, is the advent of low-dimensional semiconductor quantum structures. The research and development activity in this field is moving fast and it is thus important to afford scientists and engineers the opportunity to get updated by the best experts in the field. The present book draws together the latest developments in the fabrication technology of quantum structures, as well as a competent and extensive review of their fundamental properties and some remarkable applications. The book is based on a set of lectures that introduce different aspects of the basic knowledge available, it has a tutorial content and could be used as a textbook. Each aspect is reviewed, from elementary concepts up to the latest developments. Audience: Undergraduates and graduates in electrical engineering and physics schools. Also for active scientists and engineers, updating their knowledge and understanding of the frontiers of the technology.
Categories: Technology & Engineering

Effective Electron Mass in Low Dimensional Semiconductors

Effective Electron Mass in Low Dimensional Semiconductors

spawns not only useful quantum effect devices but also unearths new concepts in the realm of low-dimensional materials science and related disciplines. It is worth remarking that these semiconductor nanostructures occupy a paramount ...

Author: Sitangshu Bhattacharya

Publisher: Springer Science & Business Media

ISBN: 9783642312489

Category: Science

Page: 536

View: 200

This book deals with the Effective Electron Mass (EEM) in low dimensional semiconductors. The materials considered are quantum confined non-linear optical, III-V, II-VI, GaP, Ge, PtSb2, zero-gap, stressed, Bismuth, carbon nanotubes, GaSb, IV-VI, Te, II-V, Bi2Te3, Sb, III-V, II-VI, IV-VI semiconductors and quantized III-V, II-VI, IV-VI and HgTe/CdTe superlattices with graded interfaces and effective mass superlattices. The presence of intense electric field and the light waves change the band structure of optoelectronic semiconductors in fundamental ways, which have also been incorporated in the study of the EEM in quantized structures of optoelectronic compounds that control the studies of the quantum effect devices under strong fields. The importance of measurement of band gap in optoelectronic materials under strong electric field and external photo excitation has also been discussed in this context. The influence of crossed electric and quantizing magnetic fields on the EEM and the EEM in heavily doped semiconductors and their nanostructures is discussed. This book contains 200 open research problems which form the integral part of the text and are useful for both Ph. D aspirants and researchers in the fields of solid-state sciences, materials science, nanoscience and technology and allied fields in addition to the graduate courses in modern semiconductor nanostructures. The book is written for post graduate students, researchers and engineers, professionals in the fields of solid state sciences, materials science, nanoscience and technology, nanostructured materials and condensed matter physics.
Categories: Science

Growth and Optical Properties of Wide Gap II VI Low Dimensional Semiconductors

Growth and Optical Properties of Wide Gap II   VI Low Dimensional Semiconductors

Optical Gain We have investigated the optical gain in the II-VI semiconductors under quasi steady-state (2:10ns) excitation conditions. In Fig. 2 are shown optical gain spectra, for different excitation densities, in CdSe at 1.8K. The ...

Author: T.C. McGill

Publisher: Springer Science & Business Media

ISBN: 9781468456615

Category: Science

Page: 349

View: 205

This volume contains the Proceedings of the NATO Advanced Research Workshop on "Growth and Optical Properties of Wide Gap II-VI Low Dimensional Semiconductors", held from 2 - 6 August 1988 in Regensburg, Federal Republic of Germany, under the auspices of the NATO International Scientific Exchange Programme. Semiconducting compounds formed by combining an element from column II of the periodic table with an element from column VI (so called II-VI Semiconductors) have long promised many optoelectronic devices operating in the visible region of the spectrum. However, these materials have encountered numerous problems including: large number of defects and difficulties in obtaining p- and n-type doping. Advances in new methods of material preparation may hold the key to unlocking the unfulfilled promises. During the workshop a full session was taken up covering the prospects for wide-gap II-VI Semiconductor devices, particularly light emitting ones. The growth of bulk materials was reviewed with the view of considering II-VI substrates for the novel epitaxial techniques such as MOCVD, MBE, ALE, MOMBE and ALE-MBE. The controlled introduction of impurities during non-equilibrium growth to provide control of the doping type and conductivity was emphasized.
Categories: Science

Low Dimensional Semiconductor Structures

Low Dimensional Semiconductor Structures

The final chapters deal with semiconductor lasers, mesoscopic devices, and high-speed heterostructure devices. The book contains many exercises and comprehensive references.

Author: Vvedensky (Dimitri Dimitrievich)

Publisher: Cambridge University Press

ISBN: 9780521591034

Category: Science

Page: 393

View: 840

Low-Dimensional Semiconductor Structures provides a seamless, atoms-to-devices introduction to the latest quantum heterostructures. It covers their fabrication, their electronic, optical, and transport properties, their role in exploring new physical phenomena, and their utilization in devices. The authors begin with a detailed description of the epitaxial growth of semiconductors. They then deal with the physical behaviour of electrons and phonons in low-dimensional structures. A discussion of localization effects and quantum transport phenomena is followed by coverage of the optical properties of quantum wells. They then go on to discuss nonlinear optics in quantum heterostructures. The final chapters deal with semiconductor lasers, mesoscopic devices, and high-speed heterostructure devices. The book contains many exercises and comprehensive references. It is suitable as a textbook for graduate-level courses in electrical engineering and applied physics. It will also be of interest to engineers involved in the development of new semiconductor devices.
Categories: Science

Low Dimensional Semiconductor Structures

Low Dimensional Semiconductor Structures

The semiempirical TB model is an atomistic approach and well suited to calculate the electronic band structure of low-dimensional semiconductor structures, including quantum wells and quantum dots [10]. In the following section, ...

Author: Hilmi Ünlü

Publisher: Springer Science & Business Media

ISBN: 9783642284236

Category: Science

Page: 162

View: 244

Starting with the first transistor in 1949, the world has experienced a technological revolution which has permeated most aspects of modern life, particularly over the last generation. Yet another such revolution looms up before us with the newly developed capability to control matter on the nanometer scale. A truly extraordinary research effort, by scientists, engineers, technologists of all disciplines, in nations large and small throughout the world, is directed and vigorously pressed to develop a full understanding of the properties of matter at the nanoscale and its possible applications, to bring to fruition the promise of nanostructures to introduce a new generation of electronic and optical devices. The physics of low dimensional semiconductor structures, including heterostructures, superlattices, quantum wells, wires and dots is reviewed and their modeling is discussed in detail. The truly exceptional material, Graphene, is reviewed; its functionalization and Van der Waals interactions are included here. Recent research on optical studies of quantum dots and on the physical properties of one-dimensional quantum wires is also reported. Chapters on fabrication of nanowire – based nanogap devices by the dielectrophoretic assembly approach. The broad spectrum of research reported here incorporates chapters on nanoengineering and nanophysics. In its presentation of tutorial chapters as well as advanced research on nanostructures, this book is ideally suited to meet the needs of newcomers to the field as well as experienced researchers interested in viewing colleagues’ recent advances.
Categories: Science

Electronic Properties of Multilayers and Low Dimensional Semiconductor Structures

Electronic Properties of Multilayers and Low Dimensional Semiconductor Structures

THE EVOLUTION OF SEMICONDUCTOR QUANTUM STRUCTURES IN REDUCED DIMENSIONALITY – DO-IT-YOURSELF QUANTUM MECHANICS L. Esaki IBM Thomas J. Watson Research Center Yorktown Heights, New York 10598, U.S. A. ABSTRACT - Following the past ...

Author: J.M. Chamberlain

Publisher: Springer Science & Business Media

ISBN: 9781468474121

Category: Science

Page: 490

View: 893

This Advanced Study Institute on the Electronic Properties of Multilayers and Low Dimensional Semiconductor Structures focussed on several of the most active areas in modern semiconductor physics. These included resonant tunnelling and superlattice phenomena and the topics of ballistic transport, quantised conductance and anomalous magnetoresistance effects in laterally gated two-dimensional electron systems. Although the main emphasis was on fundamental physics, a series of supporting lectures described the underlying technology (Molecular Beam Epitaxy, Metallo-Organic Chemical Vapour Deposition, Electron Beam Lithography and other advanced processing technologies). Actual and potential applications of low dimensional structures in optoelectronic and high frequency devices were also discussed. The ASI took the form of a series of lectures of about fifty minutes' duration which were given by senior researchers from a wide range of countries. Most of the lectures are recorded in these Proceedings. The younger members of the Institute made the predominant contribution to the discussion sessions following each lecture and, in addition, provided most of the fifty-five papers that were presented in two lively poster sessions. The ASl emphasised the impressive way in which this research field has developed through the fruitful interaction of theory, experiment and semiconductor device technology. Many of the talks demonstrated both the effectiveness and limitations of semiclassical concepts in describing the quantum phenomena exhibited by electrons in low dimensional structures.
Categories: Science

Devices Based on Low Dimensional Semiconductor Structures

Devices Based on Low Dimensional Semiconductor Structures

... of additional excitons which can be created is reduced by Pauli exclusion, thus decreasing the level of absorption. ... Coulomb screening dominates in 3-D semiconductors, this is not the case in lower dimensional semiconductors.

Author: M. Balkanski

Publisher: Springer Science & Business Media

ISBN: 9789400902893

Category: Science

Page: 406

View: 763

Low-dimensional semiconductor quantum structures are a major, high-technological development that has a considerable industrial potential. The field is developing extremely rapidly and the present book represents a timely guide to the latest developments in device technology, fundamental properties, and some remarkable applications. The content is largely tutorial, and the book could be used as a textbook. The book deals with the physics, fabrication, characteristics and performance of devices based on low-dimensional semiconductor structures. It opens with fabrication procedures. The fundamentals of quantum structures and electro-optical devices are dealt with extensively. Nonlinear optical devices are discussed from the point of view of physics and applications of exciton saturation in MQW structures. Waveguide-based devices are also described in terms of linear and nonlinear coupling. The basics of pseudomorphic HEMT technology, device physics and materials layer design are presented. Each aspect is reviewed from the elementary basics up to the latest developments. Audience: Undergraduates in electrical engineering, graduates in physics and engineering schools. Useful for active scientists and engineers wishing to update their knowledge and understanding of recent developments.
Categories: Science