Semiconductors Probed by Ultrafast Laser Spectroscopy Pt I

List of ContributorsPrefaceContents of Volume III Relaxation of Carriers 1. Relaxation of Momentum and Energy of Carriers in Semiconductors I. Introduction II. Relaxation Processes III. Momentum Relaxation IV. Energy Relaxation V. Experimental Results VI. Conclusion References 2. Hot Carriers in Semiconductors Probed by Picosecond Techniques I. Introduction II. Theoretical Concepts III. Experimental Results References 3. Ultrafast Relaxation Processes of Hot Photoexcited Carriers I. Introduction II. The Photoexcited Carrier Distribution Function III. The Photoexcited Carrier Transition Rates IV. Hot-Carrier Relaxation during Transient Photoexcitation V. Hot-Carrier Relaxation during Steady-State Photoexcitation VI. Summary and Conclusion References 4. Luminescence and Absorption in Layered Semiconductors under Intense Excitation I. Introduction II. Lifetime of Excitons III. Exciton Collisions and Excitonic Molecules IV. Electron-Hole Plasma and Electron-Hole Drops V. Stimulated Emission ReferencesII Relaxation of Semiconductor Plasmas and Phonons 5. Relaxation Processes in Nonequilibrium Semiconductor Plasma I. Introduction II. Ultrafast Response of Semiconductor Plasma III. Theoretical Background IV. Plasma Kinetics in GaAs V Concluding Remarks References 6. Picosecond Spectroscopy of High-Density Electron-Hole Plasma in Direct-Gap Semiconductors I. Introduction II. Calculations of Ground-State Energy, Luminescence Spectra, and Energy Relaxation of EHP III. Experimental Technique IV. Observation of Spontaneous Luminescence Spectra V. Energy Relaxation Processes in EHP VI. Discussion of the Nature of EHP References 7. Dynamics of High-Density Transient Electron-Hole Plasmas in Germanium I. Introduction II. The Physics of Nonlinear Absorption in Germanium III. Interband Saturation, Intervalence-Band Absorption, and Surface Recombination IV. Measurements of Nonlinear Carrier Diffusion: The Transient Grating Technique V. Anisotropic State-Filling VI. Summary and Conclusions References 8. Ultrafast Relaxation of Optical Phonons Investigated with Picosecond Pulses I. Introduction II. Theoretical Remarks III. Decay Time of Coherently Excited Lattice Vibrations IV. Dynamics of Incoherently Excited Lattice Vibrations V. Conclusion ReferencesIII Relaxation of Coupled Systems 9. Picosecond Dynamics of Excitonic Polaritons and Excitonic Molecules I. Introduction II. Picosecond Laser System III. Picosecond Time-of-Flight Measurements of Excitonic Polaritons IV. Dynamic Relaxation Processes of Excitonic Polaritons V. Radiative Lifetime of Excitonic Molecules References 10. New Picosecond Spectroscopies for Probing Excitonic Polaritons and Their Kinetics in Semiconductors I. Introduction II. Time-of-Flight Method III. Transient-Grating Spectroscopy IV. Induced Absorption Spectroscopy V. Conclusion ReferencesIV. Transient Transport and Diffusion of Carriers 11. Diffusion of Hot Carriers at High Lattice and Electronic Temperatures I. Introduction II. General Thermodynamic Description III. Diffusion Equations IV. Experiments V. Concluding Remarks References 12. Transient and Stationary Properties of Hot-Carrier Diffusivity in Semiconductors I. Introduction II. Transport Theory III. Steady-State Diffusion IV. Transient Diffusion V.