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The Effect Of Temperature On The Resonant Tunneling And Electric Field Domain Formation In Multiple Quantum Well Superlattices
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Book Synopsis The Effect of Temperature on the Resonant Tunneling and Electric Field Domain Formation in Multiple Quantum Well Superlattices by :
Download or read book The Effect of Temperature on the Resonant Tunneling and Electric Field Domain Formation in Multiple Quantum Well Superlattices written by and published by . This book was released on 1997 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analyzing the photocurrent spectra and the I-V characteristics of weakly coupled GaAs/AlGaAs multiquantum well structures, different transport regimes are distinguished. At low temperatures (below ~50 K), due to the electron coherence over a few periods of the superlattice, electron transport is dominated by sequential resonant tunneling. At higher temperatures, evidences for the increased contribution of nonresonant transport processes, and the subsequent modification in the electric field distribution in the device, are presented.
Book Synopsis Low Temperature Electronics by : Edmundo A. Gutierrez-D
Download or read book Low Temperature Electronics written by Edmundo A. Gutierrez-D and published by Elsevier. This book was released on 2000-10-25 with total page 986 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low Temperature Electronics: Physics, Devices, Circuits, and Applications summarizes the recent advances in cryoelectronics starting from the fundamentals in physics and semiconductor devices to electronic systems, hybrid superconductor-semiconductor technologies, photonic devices, cryocoolers and thermal management. Furthermore, this book provides an exploration of the currently available theory, research, and technologies related to cryoelectronics, including treatment of the solid state physical properties of the materials used in these systems. Current applications are found in infrared systems, satellite communications and medical equipment. There are opportunities to expand in newer fields such as wireless and mobile communications, computers, and measurement and scientific equipment. Low temperature operations can offer certain advantages such as higher operational speeds, lower power dissipation, shorter signal transmission times, higher semiconductor and metal thermal conductivities, and improved digital and analog circuit performance. The computer, telecommunication, and cellular phone market is pushing the semiconductor industry towards the development of very aggressive device and integrated circuit fabrication technologies. This is taking these technologies towards the physical miniaturization limit, where quantum effects and fabrication costs are becoming a technological and economical barrier for further development. In view of these limitations, operation of semiconductor devices and circuits at low temperature (cryogenic temperature) is studied in this book. * It is a book intended for a wide audience: students, scientists, technology development engineers, private companies, universities, etc. * It contains information which is for the first time available as an all-in-one source; Interdisciplinary material is arranged and made compatible in this book * It is a must as reference source
Book Synopsis Nonlinear Wave Methods for Charge Transport by : Luis L. Bonilla
Download or read book Nonlinear Wave Methods for Charge Transport written by Luis L. Bonilla and published by John Wiley & Sons. This book was released on 2009-12-09 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present book introduces and develops mathematical techniques for the treatment of nonlinear waves and singular perturbation methods at a level that is suitable for graduate students, researchers and faculty throughout the natural sciences and engineering. The practice of implementing these techniques and their value are largely realized by showing their application to problems of nonlinear wave phenomena in electronic transport in solid state materials, especially bulk semiconductors and semiconductor superlattices. The authors are recognized leaders in this field, with more than 30 combined years of contributions.
Book Synopsis Applied Science & Technology Index by :
Download or read book Applied Science & Technology Index written by and published by . This book was released on 1997 with total page 2948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantum Well and Superlattice Physics by :
Download or read book Quantum Well and Superlattice Physics written by and published by . This book was released on 1996 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sequential Resonant Tunneling and Electric Field Effects in Semiconductor Superlattices by :
Download or read book Sequential Resonant Tunneling and Electric Field Effects in Semiconductor Superlattices written by and published by . This book was released on 1997 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report focuses on mechanisms of negative-differential-conductance in weakly-coupled semiconductor superlattices and, in particular, on the phenomenon of sequential resonant tunneling leading to electric-field domains. Our approach involves a combination of various theoretical and experimental methods including time-resolved photoluminescence, Raman scattering and near-field-optical microscopy. A nearly complete understanding of the domain process has emerged. Specifically, a phase diagram has been established and the various parameters which control transport behavior have been identified. In photoexcited and intentionally doped superlattices, static domains dominate at high carrier concentrations while oscillations occur in a narrow density region above the regime of the quantum-confined Stark effect. Doped, although not photoexcited structures exhibit sustained GHz oscillations. The relevance of these findings to Bloch oscillations is discussed.
Book Synopsis Properties of III-V Quantum Wells and Superlattices by : P. K. Bhattacharya
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.
Book Synopsis Electrical & Electronics Abstracts by :
Download or read book Electrical & Electronics Abstracts written by and published by . This book was released on 1997 with total page 1904 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1995 with total page 538 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 1170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book JJAP written by and published by . This book was released on 1998 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Japanese Journal of Applied Physics by :
Download or read book Japanese Journal of Applied Physics written by and published by . This book was released on 1998 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Novel Electric-Field Effects in Quantum Wells, Superlattices, and Microcavities by :
Download or read book Novel Electric-Field Effects in Quantum Wells, Superlattices, and Microcavities written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have used an external electric field to control important properties of semiconductor quantum wells. Specifically: (1) We have modified the exciton-exciton interaction. This interaction is determined by many-body effects, which depend on the overlap between the exciton's electron and hole wavefunctions, and is manifested in the energy difference between photoluminescence spectra with different polarizations. In time-resolved photoluminescence (PL) experiments with circular polarization we have observed that spectral difference, which we controlled by an electric field applied to GaAs-GaAlAs coupled quantum wells. Our results confirm the predictions of theory but also point out its limitations to fully explain our observations. (2) We have reversed the valence-band ordering in strained-layer quantum wells, thus 'undoing' the effects of strain. To prove the concept we have used strained InGaAs-InAlAs quantum wells in which the light-hole state is the ground state in the valence band. Photocurrent measurements under various fields have shown a change in the valence-band states that contribute to the fundamental (lowest-energy) transition, from light-hole states to heavy-hole states. This result opens the door to reversing the polarization of light emission in quantum wells, from TM to TE, which could find application in optical modulators. (3) We have shown the presence of low-temperature exciton-photon coupling in microcavities using PL spectroscopy. Because of thermalization until now it has been almost impossible to use PL to study at low temperature (T = 20K or less) the coupling of excitons and photons. We have determined the difference between the lowest-energy PL peak from a quantum well-microcavity system and that of an isolated quantum well, at various temperatures. This difference is constant with T when a field is applied but is T dependent when the field is suppressed. The maximum variation is a direct measure of the exciton-photon coupling.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1994 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the 25th International Conference on the Physics of Semiconductors Part I by : N. Miura
Download or read book Proceedings of the 25th International Conference on the Physics of Semiconductors Part I written by N. Miura and published by Springer. This book was released on 2001-05-17 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the proceedings of the most important and prestigious conference in the field of semiconductor physics, this book contains the latest information on the progress of semiconductor physics. Almost 1000 contributed papers address the full range of current topics. The special symposium deals with the interface between the fundamentals and device applications and tries to predict the developments in semiconductor physics, semiconductor materials and device applications in the 21st century. A wide range of contributions represent the forefront of academic and industrial research.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1992 with total page 1400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
