[PDF] Electron And Phonon Dynamics In Quantum Well Systems Probed By Time And Angle Resolved Photoemission In The Visible And Xuv Regime eBook

Author : Alexander Shik
Publisher : World Scientific
Page : 106 pages
File Size : 26,6 MB
Release : 1998-01-09
Category : Science
ISBN : 9814496863

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This invaluable book is devoted to the physics, technology and device applications of semiconductor structures with ultrathin layers where the electronic properties are governed by the quantum-mechanical laws. Such structures called quantum wells or structures with the two-dimensional electron gas, have become one of the most actively investigated objects in modern solid state physics. Electronic properties of quantum wells differ dramatically from those of bulk semiconductors, which allows one to observe new types of physical phenomena, such as the quantum Hall effect and many other so-far-unknown kinetic and optical effects. This, in turn, offers wide opportunities for creating semiconductor devices based on new principles, and it has give birth to the new branch of electronics called nanoelectronics.

Author : E. A. Zibik
Publisher :
Page : 4 pages
File Size : 22,53 MB
Release : 2001
Category :
ISBN :

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We present investigations of the intersubband electron dynamics in asymmetric tunnel-coupled GaAs/AlGaAs quantum wells. The study is performed by time resolved pump and probe experiments. Temporal evolution of the bleaching signals has biexponential behaviour. In addition to the time of the relaxation into the ground state with LO-phonon emission a second long decay time depending on transition energy and temperature is observed. We associate the second recovery time with transitions between confined F-state of quantum wells and states in the barriers including Xz-states which appear due to high content of Al. The influence of the transitions between subbands with energy separation less than optical phonon energy on the relaxation processes is also discussed.

Author : B.R. Nag
Publisher : Springer Science & Business Media
Page : 309 pages
File Size : 16,78 MB
Release : 2006-04-11
Category : Science
ISBN : 0306471272

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Quantum well devices have been the objects of intensive research during the last two decades. Some of the devices have matured into commercially useful products and form part of modern electronic circuits. Some others require further dev- opment, but have the promise of being useful commercially in the near future. Study of the devices is, therefore, gradually becoming compulsory for electronics specialists. The functioning of the devices, however, involve aspects of physics which are not dealt with in the available text books on the physics of semicond- tor devices. There is, therefore, a need for a book to cover all these aspects at an introductory level. The present book has been written with the aim of meeting this need. In fact, the book grew out of introductory lectures given by the author to graduate students and researchers interested in this rapidly developing area of electron devices. The book covers the subjects of heterostructure growth techniques, band-offset theory and experiments, electron states, electron-photon interaction and related phenomena, electron transport and the operation of electronic, opto-electronic and photonic quantum well devices. The theory as well as the practical aspects of the devices are discussed at length. The aim of the book is to provide a comprehensive treatment of the physics underlying the various devices. A reader after going through the book should find himself equipped to deal with all kinds of quantum well devices.

Author : Hui C. Liu
Publisher : Springer Science & Business Media
Page : 573 pages
File Size : 25,42 MB
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9401111448

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Intersubband transitions in quantum wells have attracted tremendous attention in recent years, mainly due to the promise of applications in the mid and far-infrared regions (2--20 mum). Many of the papers presented in Quantum Well Intersubband Transition Physics and Devices are on the basic linear intersubband transition processes, detector physics and detector application, reflecting the current state of understanding and detector applications, where highly uniform, large focal plane arrays have been demonstrated. Other areas are still in their early stages, including infrared modulation, harmonic generation and emission.

Author : James Louis Educato
Publisher :
Page : pages
File Size : 40,25 MB
Release : 1993
Category :
ISBN :

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The III-V compound semiconductor devices employing quantum well (QW) structures play an essential role in the field of optoelectronics. This thesis focuses on the quantum mechanical aspects of electron dynamics and relaxation (or capture) in QW structures with particular attention paid to understanding and interpreting the results from the various optical experiments performed on QW structures. First, the transfer matrix technique used to calculate the electronic properties of QW structures is described. Next, a general discussion of the electron-phonon interactions important for QW structures is made, stressing the role of confined polar optical phonons including the electron-phonon coupling for confined slab and interface phonons. In addition, optical deformation potential phonon-electron coupling pertaining to intervalley scattering is discussed. Then, a rate equation formulation for electron and phonon dynamics in QW systems is derived. Finally, a detailed discussion describing electron dynamics and relaxation in various QW structures begins with undoped QW structures. This development is followed by a discussion of electron capture in modulation-doped QW structures. Finally, intersubband transitions in asymmetric QW structures stressing the role of interface phonon modes is presented.

Author : Stephan Hüfner
Publisher : Springer Science & Business Media
Page : 411 pages
File Size : 40,56 MB
Release : 2007-02-09
Category : Science
ISBN : 3540681302

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Photoemission spectroscopy is one of the most extensively used methods to study the electronic structure of atoms, molecules, and solids and their surfaces. This volume introduces and surveys the field at highest energy and momentum resolutions allowing for a new range of applications, in particular for studies of high temperature superconductors.