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Resonance Effects of Excitons and Electrons

2013-06-01 Science
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Release : 2013-06-01
Genre : Science
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Book Synopsis Resonance Effects of Excitons and Electrons by : Ion Geru

Download or read book Resonance Effects of Excitons and Electrons written by Ion Geru. This book was released on 2013-06-01. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the various types of resonance effects on excitons, biexcitons and the local electronic centers (LEC) in solids, such as paramagnetic and paraelectric resonances on excitons, exciton acoustic resonance at intra- and interband transitions, radio-optical double resonance on excitons, hole-nuclear double resonance on localized biexcitons, ENDOR and acoustic ENDOR on LEC. The criteria for the generation of coherent photons, phonons and magnons by excitons are explained. The interactions of excitons and biexcitons with paramagnetic centers and nuclear spins, the indirect interaction between the PC through a field of excitons as well as the quasienergy spectrum of excitons and spin systems are discussed. It is proved that the interaction of paramagnetic centers with excitons increases the spin relaxation rate of paramagnetic centers in comparison with the case of their interaction with free carriers. The giant magneto-optical effects in semi-magnetic semiconductors are theoretically interpreted. In recent years, a new perspective has been added to these systems and their interactions: They can be used for storing and processing information in the form of quantum bits (qubits), the building blocks of quantum computers. The basics of this emerging technology are explained and examples of demonstration-type quantum computers based on localized spins in solids are discussed.

Polarons and Excitons in Polar Semiconductors and Ionic Crystals

2013-06-29 Science
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Release : 2013-06-29
Genre : Science
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Book Rating : 931/5 ( reviews)

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Book Synopsis Polarons and Excitons in Polar Semiconductors and Ionic Crystals by : J.T. Devreese

Download or read book Polarons and Excitons in Polar Semiconductors and Ionic Crystals written by J.T. Devreese. This book was released on 2013-06-29. Available in PDF, EPUB and Kindle. Book excerpt: The 1982 Antwerp Advanced Study Institute on "Physics of Polarons and Excitons in Polar Semiconductors and Ionic Crystals" took place from July 26 till August 5 at the Conference Center Priorij Corsen donk, a restored monastery, close to the city of Antwerp. It was the seventh Institute in our series which started in 1971. This Advanced Study Institute, which was held fifty years after Landau introduced the polaron concept, can be considered as the third major international symposium devoted to the physics of pola rons. The first such symposium took place in St. Andrews in 1962 under the title "Polarons and Excitons" [I]. The early theoretical developments related to polarons were reviewed in depth at this meeting; the derivation of the polaron hamiltonian by Frohlich, the Frohlich weak coupling theory (and the equivalent weak coupling canonical transformations), the Landau-Pekar and Bogolubov strong coupling theory and the Feynman polaron model formulated with his path integrals. The main emphasis was on the polaron self-energy, effective mass and mobility. From the experimental side the first evidence for polaron effects was provided by the pioneering cyclotron and mobility measurements o~ the silver halides by F. e. Brown and his group. Also the significance of polaron effects for the under standing of excitons in ionic crystals was a central topic in St. Andrews. The second Advanced Study Institute concerning polaron physics was organized at the University of Antwerp (R. U. C. A.

Electron and Photon Confinement in Semiconductor Nanostructures

2003 Science
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Release : 2003
Genre : Science
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Book Rating : 521/5 ( reviews)

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Book Synopsis Electron and Photon Confinement in Semiconductor Nanostructures by : Benoît Deveaud

Download or read book Electron and Photon Confinement in Semiconductor Nanostructures written by Benoît Deveaud. This book was released on 2003. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this course was to give an overview of the physics of artificial semiconductor structures confining electrons and photons. It furnishes the background for several applications in particular in the domain of optical devices, lasers, light emitting diodes or photonic crystals. The effects related to the microactivity polaritons, which are mixed electromagnetic radiation-exciton states inside a semiconconductor microactivity are covered. The study of the characteristics of such states shows strong relations with the domain of cavity quantum electrodynamics and thus with the investigation of some fundamental theoretical concepts.

Resonance Effects in Electron-ion Collisons

1986
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Release : 1986
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Book Synopsis Resonance Effects in Electron-ion Collisons by : Nagoya Daigaku. Purazuma Kenkyūjo

Download or read book Resonance Effects in Electron-ion Collisons written by Nagoya Daigaku. Purazuma Kenkyūjo. This book was released on 1986. Available in PDF, EPUB and Kindle. Book excerpt:

Optics of Excitons in Confined Systems, Proceedings of the INT Meeting, Italy, 24-27 September 1991

1992-03-26 Technology & Engineering
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Release : 1992-03-26
Genre : Technology & Engineering
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Book Rating : 138/5 ( reviews)

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Book Synopsis Optics of Excitons in Confined Systems, Proceedings of the INT Meeting, Italy, 24-27 September 1991 by : Andrea D'Andrea

Download or read book Optics of Excitons in Confined Systems, Proceedings of the INT Meeting, Italy, 24-27 September 1991 written by Andrea D'Andrea. This book was released on 1992-03-26. Available in PDF, EPUB and Kindle. Book excerpt: Optics of Excitons in Confined Systems provides an overview of research in semiconductors that exhibit resonance enhanced optical nonlinearities in the frequency range close to the valence-conduction band gap. The book is divided into the following sections: quantum wells, wires, and dots; superlattices; nonlinear optical properties of confined systems; and effects of external fields on confined systems. Topics range from fundamental theory to more applied aspects of excitons in confined sytems.

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