Articles liés à Excitonic Processes in Solids
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Synopsis
1. Introduction.- 1.1 The Ground State of Many-Body Systems and the Modes of Excitation.- 1.2 Electronic Excitation in Insulators and the Wannier-Mott Exciton.- 1.3 The Frenkel Exciton.- 1.4 The General Case.- 1.4.1 Effective Mass Approximation.- 1.4.2 The Role of Spin.- 1.4.3 Interplay of Spin-Orbit and Exchange Interactions.- 1.4.4 Davydov Splitting.- 1.4.5 Charge Transfer Excitons.- 1.5 Optical Absorption Spectra.- 1.5.1 Allowed Edge Case.- 1.5.2 Forbidden Edge Case.- 1.5.3 Transition from Frenkel to Wannier-Mott Exciton.- 1.6 The Polariton and Spatial Dispersion.- 1.7 Scope of the Present Book.- 2. Theoretical Aspects of Excitonic Molecules.- 2.1 Fission and Fusion of Excitons vs. Chemical Reaction into Excitonic Molecules.- 2.2 The Excitonic Molecule and Electron-Hole Liquid.- 2.2.1 Binding Energy and Electronic Structure of Excitonic Molecule in a Simple System - CuX.- 2.2.2 The Metallic Droplet and Excitonic Molecule in Many-Valley Structures - Ge and Si.- 2.2.3 The Excitonic Molecule in Many-Valley Systems - TlX and AgX.- 2.2.4 Influence of the Polarizable Lattice and the Effect of Anisotropic Effective Mass - CdS and CdSe.- 2.2.5 The Direct Forbidden Exciton - Cu2O.- 2.3 Optical Response of an Excitonic Molecule.- 2.3.1 Luminescence Spectrum.- 2.3.2 Relaxation by Emission of Acoustic Phonons.- 2.3.3 Optical Conversion of Excitons into Excitonic Molecules.- 2.3.4 Giant Two-Photon Absorption.- 2.4 Coherent Optical Phenomena Due to the Excitonic Molecule.- 2.4.1 Hyper-Raman Scattering and Luminescence.- 2.4.2 Two-Polariton Scattering Due to the Excitonic Molecule.- 2.4.3 Dispersion of the Exciton Polariton and Excitonic Molecule.- 2.4.4 Four-Wave Mixing Due to the Excitonic Molecule.- 2.4.5 Phase-Conjugation by Four-Wave Mixing.- 2.5 The Excitonic Molecule at High Densities.- 2.5.1 Renormalization of the Exciton Polariton Due to the Excitonic Molecule Giant Two-Photon Absorption.- 2.5.2 Polarization Rotation Effects Due to Two-Photon Excitation of the Excitonic Molecule.- 2.5.3 Multi-Polariton Scattering Via Excitonic Molecules.- 2.5.4 Optical Bistability Due to the Excitonic Molecule.- 2.5.5 Relaxation and Bose Condensation of Excitonic Molecules.- 3. The Exciton and Excitonic Molecule in Cuprous Halides.- 3.1 Band Structure and Excitonic States.- 3.2 Exciton Absorption, Reflection, and Emission Spectra.- 3.2.1 Absorption and Reflection Spectra.- 3.2.2 Splitting of Exciton Bands by Perturbations.- 3.2.3 Emission Spectra.- 3.2.4 Phonon Structure in the Excitation Spectra of Free-Exciton Emission.- 3.2.5 Bound Excitons.- 3.2.6 CuCl-CuBr Solid Solutions.- 3.3 High-Density Excitation Effects.- 3.3.1 Exciton-Electron Interaction.- 3.3.2 Effect on Exciton Absorption Bands.- 3.3.3 Creation of the Excitonic Molecule by Exciton-Exciton Collision.- 3.4 Giant Two-Photon Excitation of the Excitonic Molecule.- 3.4.1 Evidence of Giant Two-Photon Creation.- 3.4.2 Giant Two-Photon Absorption.- 3.5 Two-Photon Resonant Raman Scattering Via the Excitonic Molecule.- 3.5.1 Backward Scattering.- 3.5.2 Forward Scattering.- 3.5.3 Scattering with Recoil of the Upper-Branch Polariton.- 3.5.4 Polarization Character - Geometrical Selection Rules.- 3.5.5 Nonlinear Change of Exciton-Polariton Dispersion Associated with the GTA.- 3.6 Acoustic-Phonon Interaction of the Excitonic Molecule.- 3.7 Coexistence of Luminescence and Raman Components in the Resonant Excitation.- 3.8 Redistribution of Excitonic Molecules Resonantly Generated by Two-Photon Excitation.- 3.8.1 Calculation of Line-Shapes of the Excitonic Molcecule Luminescence.- 3.9 Relaxation of the Excitonic Molecule Due to Intermolecular Collisions: Influence on the GTA and Secondary Emissions.- 3.9.1 Effect on the GTA Spectra.- 3.9.2 Effect on Secondary Emissions.- 3.10 Spatial Dispersion of the Exciton and Excitonic Molecule.- 3.10.1 CuCl.- 3.10.2 CuBr.- 3.11 Higher Excited States of the Excitonic Molecule.- 4. Theory of Excitons in Phonon Fields.- 4.1 Electron-Phonon Interactions.- 4.1.1 Type
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