Download or read book Growth and Characterization of Low Density InAs GaAs Quantum Dots for Quantum Information Processes written by and published by . This book was released on 2007 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Growth and Characterization of Low Density InAs GaAs Quantum Dots QD for Quantum Information Processes written by and published by . This book was released on 2010 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this project was to study the characteristics of the large QDs in a PC-based mu-cavity and finally develop the single photon source (SPS). Better understanding of large QDs without mu-cavity would lead to better understanding of the large QDs with mu-cavity. So, the PI studied the large single QD and coupled QD further on their optical properties. Design of PC-based mu-cavity should be followed for the growth and fabrication of photonic-crystal based mu-cavity with low density In(Ga)As/GaAs QDs, which can act as a single photon source. The final goal of the 3-year project is to develop the PC-based single photon source with large In(Ga)As/GaAs QDs.
Download or read book Self Assembled Quantum Dots written by Zhiming M Wang and published by Springer Science & Business Media. This book was released on 2007-11-29 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: This multidisciplinary book provides up-to-date coverage of carrier and spin dynamics and energy transfer and structural interaction among nanostructures. Coverage also includes current device applications such as quantum dot lasers and detectors, as well as future applications to quantum information processing. The book will serve as a reference for anyone working with or planning to work with quantum dots.
Download or read book Growth and Characterization of Low density InP based Quantum Dots for Telecommunication Wavelengths written by Matusala Yacob and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Next Generation Photovoltaics written by A. Martí and published by CRC Press. This book was released on 2003-09-01 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although photovoltaics are regarded by many as the most likely candidate for long term sustainable energy production, their implementation has been restricted by the high costs involved. Nevertheless, the theoretical limit on photovoltaic energy conversion efficiency-above 85%-suggests that there is room for substantial improvement of current comme
Download or read book Impact of Ion Implantation on Quantum Dot Heterostructures and Devices written by Arjun Mandal and published by Springer. This book was released on 2017-06-02 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book looks at the effects of ion implantation as an effective post-growth technique to improve the material properties, and ultimately, the device performance of In(Ga)As/GaAs quantum dot (QD) heterostructures. Over the past two decades, In(Ga)As/GaAs-based QD heterostructures have marked their superiority, particularly for application in lasers and photodetectors. Several in-situ and ex-situ techniques that improve material quality and device performance have already been reported. These techniques are necessary to maintain dot density and dot size uniformity in QD heterostructures and also to improve the material quality of heterostructures by removing defects from the system. While rapid thermal annealing, pulsed laser annealing and the hydrogen passivation technique have been popular as post-growth methods, ion implantation had not been explored largely as a post-growth method for improving the material properties of In(Ga)As/GaAs QD heterostructures. This work attempts to remedy this gap in the literature. The work also looks at introduction of a capping layer of quaternary alloy InAlGaAs over these In(Ga)As/GaAs QDs to achieve better QD characteristics. The contents of this volume will prove useful to researchers and professionals involved in the study of QDs and QD-based devices.
Download or read book Growth and Characterization of InAs Quantum Dots Prepared by Low pressure Metal organic Vapor Phase Epitaxy Using N2 as Carrier Gas written by Hui Wang (Ph. D.) and published by . This book was released on 2004 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Growth and Characterization of Long Chains of InAs Quantum Dot Molecules written by and published by . This book was released on 2006 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: InAs quantum dot molecules (QDMs) are obtained from quantum dot (QD) overgrowth on nanopropeller templates which are grown by thin-capping-and-regrowth molecular beam epitaxy (MBE) process. The template structure is elongated along [110] crystallographic direction with QDs at the centre. They were used to grow QDMs aligned in that direction. Multi-cycles of thin-capping-and-regrowth with appropriate thin-capping thickness were investigated in order to create long nanopropeller templates. They are used as templates for the growth of long chain quantum dot molecules. By overgrowth of additional QDs in the final cycle of thin-capping-and-regrowth, satellite QDs are created on nanopropeller blades. With proper overgrowth thickness, long chain QDMs are successfully created on long nanopropeller templates. Lateral alignment of long chain QDMs contribute to anisotropic coupling among QDs. They lead to different magnitudes of wave vectors between [110] and [110] directions in the energy band structure of QDs ensembles. Hence, long chain QDMs demonstrate anisotropy of optical property, i.e. polarization dependence of PL spectrum, while as-grown QDs and small-group QDMs do not exhibit this property. The polarization degree of optical property agrees with the length of QDMs and their templates. However high QD density limits the anisotropic property due to increased QD coupling along the [110] direction.
Download or read book Quantum Dot Devices written by Zhiming M. Wang and published by Springer Science & Business Media. This book was released on 2012-05-24 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum dots as nanomaterials have been extensively investigated in the past several decades from growth to characterization to applications. As the basis of future developments in the field, this book collects a series of state-of-the-art chapters on the current status of quantum dot devices and how these devices take advantage of quantum features. Written by 56 leading experts from 14 countries, the chapters cover numerous quantum dot applications, including lasers, LEDs, detectors, amplifiers, switches, transistors, and solar cells. Quantum Dot Devices is appropriate for researchers of all levels of experience with an interest in epitaxial and/or colloidal quantum dots. It provides the beginner with the necessary overview of this exciting field and those more experienced with a comprehensive reference source.
Download or read book Self Assembled InGaAs GaAs Quantum Dots written by and published by Academic Press. This book was released on 1999-03-29 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is concerned with the crystal growth, optical properties, and optical device application of the self-formed quantum dot, which is one of the major current subjects in the semiconductor research field.The atom-like density of states in quantum dots is expected to drastically improve semiconductor laser performance, and to develop new optical devices. However, since the first theoretical prediction for its great possibilities was presented in 1982, due to the difficulty of their fabrication process. Recently, the advent of self-organized quantum dots has made it possible to apply the results in important optical devices, and further progress is expected in the near future.The authors, working for Fujitsu Laboratories, are leading this quantum-dot research field. In this volume, they describe the state of the art in the entire field, with particular emphasis on practical applications.
Download or read book Exploring Single Hole States in InAs GaAs Quantum Dots and Quantum Dot Molecules Under 2 D Electric Fields written by Xiangyu Ma and published by . This book was released on 2019 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: InAs/GaAs quantum dots (QDs) and quantum dot molecules (QDMs) are self-assembled semiconductor nanostructures that can trap a single electron or hole in a 3-D potential-well. Grown by molecular beam epitaxy (MBE), they have excellent optical qualities that can be used in applications for quantum information processing and quantum computing. Specifically, hole spins in a single QD/QDM have longer decoherence time than electron spins due to the lack of hyperfine interaction, making hole spins a great qubit candidate. However, many challenges such as QD growth, device integration, and spin manipulation inhibit the scalability of a hole-spin-based quantum information platform. A deeper understanding of the hole spin physics and the QD/QDM material system is needed to advance device engineering opportunities.
Download or read book Handbook of Crystal Growth written by Tom Kuech and published by Elsevier. This book was released on 2014-11-02 with total page 1384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume IIIA Basic TechniquesHandbook of Crystal Growth, Second Edition Volume IIIA (Basic Techniques), edited by chemical and biological engineering expert Thomas F. Kuech, presents the underpinning science and technology associated with epitaxial growth as well as highlighting many of the chief and burgeoning areas for epitaxial growth. Volume IIIA focuses on major growth techniques which are used both in the scientific investigation of crystal growth processes and commercial development of advanced epitaxial structures. Techniques based on vacuum deposition, vapor phase epitaxy, and liquid and solid phase epitaxy are presented along with new techniques for the development of three-dimensional nano-and micro-structures.Volume IIIB Materials, Processes, and TechnologyHandbook of Crystal Growth, Second Edition Volume IIIB (Materials, Processes, and Technology), edited by chemical and biological engineering expert Thomas F. Kuech, describes both specific techniques for epitaxial growth as well as an array of materials-specific growth processes. The volume begins by presenting variations on epitaxial growth process where the kinetic processes are used to develop new types of materials at low temperatures. Optical and physical characterizations of epitaxial films are discussed for both in situ and exit to characterization of epitaxial materials. The remainder of the volume presents both the epitaxial growth processes associated with key technology materials as well as unique structures such as monolayer and two dimensional materials.Volume IIIA Basic Techniques - Provides an introduction to the chief epitaxial growth processes and the underpinning scientific concepts used to understand and develop new processes. - Presents new techniques and technologies for the development of three-dimensional structures such as quantum dots, nano-wires, rods and patterned growth - Introduces and utilizes basic concepts of thermodynamics, transport, and a wide cross-section of kinetic processes which form the atomic level text of growth process Volume IIIB Materials, Processes, and Technology - Describes atomic level epitaxial deposition and other low temperature growth techniques - Presents both the development of thermal and lattice mismatched streams as the techniques used to characterize the structural properties of these materials - Presents in-depth discussion of the epitaxial growth techniques associated with silicone silicone-based materials, compound semiconductors, semiconducting nitrides, and refractory materials
Download or read book Site Control and Potical Characterization of InAs Quantum Dots Grown in GaAs Nanoholes written by and published by . This book was released on 2013 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Self Assembled Quantum Dots written by Zhiming M. Wang and published by Springer. This book was released on 2008-11-01 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: This multidisciplinary book provides up-to-date coverage of carrier and spin dynamics and energy transfer and structural interaction among nanostructures. Coverage also includes current device applications such as quantum dot lasers and detectors, as well as future applications to quantum information processing. The book will serve as a reference for anyone working with or planning to work with quantum dots.
Download or read book JJAP written by and published by . This book was released on 2004 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EMC 2008 written by Silvia Richter and published by Springer Science & Business Media. This book was released on 2008-09-20 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the14th European Microscopy Congress, held in Aachen, Germany, 1-5 September 2008. Jointly organised by the European Microscopy Society (EMS), the German Society for Electron Microscopy (DGE) and the local microscopists from RWTH Aachen University and the Research Centre Jülich, the congress brings together scientists from Europe and from all over the world. The scientific programme covers all recent developments in the three major areas of instrumentation and methods, materials science and life science.
