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Book
On exciton-vibration and exciton-photon interactions in organic semiconductors
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ISBN: 303085454X 3030854531 Year: 2021 Publisher: Cham, Switzerland : Springer,

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Book
Excitons
Authors: ---
ISBN: 9535138707 9535138693 9535140027 Year: 2018 Publisher: IntechOpen

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Excitons, as part of the InTech collection of international works on optics and optoelectronics, contains recent achievements of specialists from China, France, Japan, Switzerland, and Moldova jointly with Russia and the United States of America on properties and application of excitons in electronics. The growing number of countries participating in this endeavor and joint participation of the US, Moldova, Italy, and Russian scientists in investigations of excitons in the edition of this book testify to the unifying effect of science. An interested reader will find in the book the description of properties and possible applications of excitons, as well as the methods of fabrication and analysis of operation and the regions of application of modern excitonic devices.


Book
Light-Driven Alignment
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ISBN: 3540698876 3540698884 Year: 2009 Publisher: Berlin, Heidelberg : Springer Berlin Heidelberg : Imprint: Springer,

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This book deals with influencing the properties of solids by light-driven electron transport. The theoretical basis of these effects, light-driven ordering and self-organisation, as well as optical motors are presented. With light as a tool, new ways to produce materials are opened.


Book
Symmetry and Symmetry-Breaking in Semiconductors : Fine Structure of Exciton States
Authors: ---
ISBN: 3319942352 3319942344 Year: 2018 Publisher: Cham : Springer International Publishing : Imprint: Springer,

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This book discusses group theory investigations of zincblende and wurtzite semiconductors under symmetry-breaking conditions. The text presents the group theory elements required to develop a multitude of symmetry-breaking problems, giving scientists a fast track to bypass the need for recalculating electronic states. The text is not only a valuable resource for speeding up calculations but also illustrates the construction of effective Hamiltonians for a chosen set of electronic states in crystalline semiconductors. Since Hamiltonians have to be invariant under the transformations of the point group, the crystal symmetry determines the multiplet structure of these states in the presence of spin-orbit, crystal-field, or exchange interactions. Symmetry-breaking leads to additional coupling of the states, resulting in shifts and/or splittings of the multiplets. Such interactions may be intrinsic, as in the case of the quasi-particle dispersion, or extrinsic, induced by magnetic, electric, or strain fields. Using a power expansion of the perturbations these interaction terms can be determined in their parameterized form in a unique way. The hierarchic structure of this invariant development allows to estimate the importance of particular symmetry-breaking effects in the Hamiltonian. A number of selected experimental curves are included to illustrate the symmetry-based discussions, which are especially important in optical spectroscopy. This text is written for graduate students and researchers who want to understand and simulate experimental findings reflecting the fine structure of electronic or excitonic states in crystalline semiconductors. .


Book
Excitonic and Photonic Processes in Materials
Authors: ---
ISBN: 9789812871312 9812871306 9789812871305 1322175772 9812871314 Year: 2015 Publisher: Singapore : Springer Singapore : Imprint: Springer,

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This book is expected to present state-of-the-art understanding of a selection of excitonic and photonic processes in useful materials from semiconductors to insulators to metal/insulator nanocomposites, both inorganic and organic.  Among the featured applications are components of solar cells, detectors, light-emitting devices, scintillators, and materials with novel optical properties.  Excitonic properties are particularly important in organic photovoltaics and light emitting devices, as also in questions of the ultimate resolution and efficiency of new-generation scintillators for medical diagnostics,  border security, and nuclear nonproliferation.  Novel photonic and optoelectronic applications benefit from new material combinations and structures to be discussed.


Book
Exciton Transport Phenomena in GaAs Coupled Quantum Wells
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ISBN: 3319697331 3319697323 Year: 2018 Publisher: Cham : Springer International Publishing : Imprint: Springer,

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This thesis presents results crucial to the emerging field of indirect excitons. These specially designed quasiparticles give the unique opportunity to study fundamental properties of quantum degenerate Bose gases in semiconductors. Furthermore, indirect excitons allow for the creation of novel optoelectronic devices where excitons are used in place of electrons. Excitonic devices are explored for the development of advanced signal processing seamlessly coupled with optical communication. The thesis presents and describes the author's imaging experiments that led to the discovery of spin transport of excitons. The many firsts presented herein include the first studies of an excitonic conveyer, leading to the discovery of the dynamical localization-delocalization transition for excitons, and the first excitonic ramp and excitonic diode with no energy-dissipating voltage gradient. .


Book
Resonance Effects of Excitons and Electrons : Basics and Applications
Authors: ---
ISBN: 3642358063 3642358071 Year: 2013 Publisher: Berlin, Heidelberg : Springer Berlin Heidelberg : Imprint: Springer,

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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.

Keywords

Electron paramagnetic resonance --- Exciton theory --- Physics --- Physical Sciences & Mathematics --- Atomic Physics --- Electricity & Magnetism --- Electron-hole pair theory --- Excitons, Theory of --- Electron resonance --- Electron spin resonance --- EPR (Magnetic resonance) --- ESR (Magnetic resonance) --- Paramagnetic resonance, Electron --- Physics. --- Solid state physics. --- Semiconductors. --- Spectroscopy. --- Microscopy. --- Optical materials. --- Electronic materials. --- Materials science. --- Solid State Physics. --- Optical and Electronic Materials. --- Spectroscopy and Microscopy. --- Optics, Lasers, Photonics, Optical Devices. --- Characterization and Evaluation of Materials. --- Electron paramagnetic resonance. --- Exciton theory. --- Magnetic resonance --- Paramagnetism --- Electrons --- Photons --- Quantum theory --- Solids --- Transport theory --- Surfaces (Physics). --- Surface chemistry --- Surfaces (Technology) --- Optics --- Materials --- Lasers. --- Photonics. --- Material science --- Physical sciences --- Crystalline semiconductors --- Semi-conductors --- Semiconducting materials --- Semiconductor devices --- Crystals --- Electrical engineering --- Electronics --- Solid state electronics --- New optics --- Light amplification by stimulated emission of radiation --- Masers, Optical --- Optical masers --- Light amplifiers --- Light sources --- Optoelectronic devices --- Nonlinear optics --- Optical parametric oscillators --- Analysis, Microscopic --- Light microscopy --- Micrographic analysis --- Microscope and microscopy --- Microscopic analysis --- Optical microscopy --- Analysis, Spectrum --- Spectra --- Spectrochemical analysis --- Spectrochemistry --- Spectrometry --- Spectroscopy --- Chemistry, Analytic --- Interferometry --- Radiation --- Wave-motion, Theory of --- Absorption spectra --- Light --- Spectroscope --- Electronic materials --- Qualitative --- Analytical chemistry

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