Optical Properties of Excited States in Solids

ISBN-13: 9781461363279 / Angielski / Miękka / 2012 / 733 str.

Baldassare Di Bartolo

Opis

This book presents an account of the course "Optical Properties of Excited States in Solids" held in Erice, Italy, from June 16 to 3D, 1991. This meeting was organized by the International School of Atomic and Molecular Spectroscopy of the "Ettore Majorana" Centre for Scientific Culture. The purpose of this course was to present physical models, mathematical formalisms and experimental techniques relevant to the optical properties of excited states in solids. Some active physical species, such as ions or radicals, could survive indefinitely if they were completely 'isolated in space. Other active species, such as excited molecular and solid-state systems, are inherently unstable, even in isolation, due to the spontaneous mechanisms that may convert their excitation energies into radiation or heat. Physical parameters that may be used to characterize these excited systems are the localization or delocalization, and the coherence or incoherence, of their state excitations. In solids the excited states, whether they are localized (as for impurities in insulators) or delocalized (as they may occur in semiconductors), are relevant in several regards. Their de-excitation is extremely sensitive to the nature of the excitations of the systems, and a study of the de-excitation processes can yield a variety of information. For example, the excited states may represent the initial condition of the onset of such processes as Stokes-shifted emission, hot luminescence, symmetry-dependent Jahn-Teller and scattering processes, tunneling processes, energy transfer to like and unlike centers, superradiance, coherent radiation, and excited state absorption.

Spis treści

The Nature of the Electronic Excited States of Molecular Systems; B. Di Bartolo. Properties of the Excited States of Complex Molecules; J. Reuss. Rate of Processes Involving Excited States; A.M. Stoneham. Excited States in Semiconductors; C. Klingshirn. Advances in the Characterization of Excited States of Luminescent Ions; G.F. Imbusch. Relaxed Excited States of Color Centers; G. Baldacchini. Properties of Highly Populated Excited States in Solids; F. Auzel. Advances in the Sensitization of Phosphors; B. Smets. Laser Spectroscopy inside Inhomogeneously Broadened Lines; M. MacFarlane. Excited-State Dynamics and Energy Transfer in Doped-Substituted Garnets; A. Brenier, et al. Studies of the Charge Transfer States of Certain Rare-Earth Activators in Yitrium and Lanthanum Oxysulfides; C.W. Struck, W.H. Fonger. The Jahn-Teller Effect in the Optical Spectra of Impurities; G. Viliani. 42 additional articles. Index.