Analysis and Control of Ultrafast Photoinduced Reactions

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Beschreibung

Dynamical processes in molecules like bond shaking, breaking or making c- monlytakeplaceonatimescalefromthepico-downtothefemtosecondrange. Theadventofequallyfastlasersourcesandreal-timeobservationschemeslike pump-probe spectroscopy has facilitated the direct insight into such processes wheninitiatedbylight. Inparallelthedevelopmentofadvancedcomputational methods treating the dynamics of photoexcited molecular systems allowed a convergence between theoretical description and experimental observation of such ultrafast dynamical processes. Consequently, the idea emerged, not only to analyze, but also to control molecular dynamics in real time by adequately designed light ?elds. Stimulated by theoretical concepts for in?uencing the motion of molecular wave packets by means of simple few-parameter elect- magnetic ?eld sequences, experiments were driven toward a practical reali- tion of arbitrarily shaped laser pulses. This development culminated in the active feedback control of even complex systems. In addition this o?ers the unique possibility not only to determine the outcome of chemical reactions, butalsotoretrievespeci?cinformationaboutthechosendynamicalpathways, that is, to perform analysis by control. This book illustrates a vital research ?eld by covering a broad spectrum of molecular systems with growing complexity while demonstrating at the same time the convergence of experimental and theoretical approaches. After a g- eral introduction in Chapter 1, Chapter 2 starts with small isolated molecules in the unperturbed environment of the gas phase and Chapter 3 proceeds to more complex systems, but still in vacuum. A higher level of complexity is then reached in Chapter 4 where small molecules in a rare gas matrices are discussed serving as prototype examples for condensed phase dynamics.
Klappentext
The present monograph summarizes, in a comprehensive way, several years of joint experimental and theoretical frontier research on ultrafast laser-induced molecular dynamics and its control. Emphasis is set on the characterization of the nuclear dynamics within molecular systems in various environments (gas phase, surfaces, solids, solution, strong fields) triggered by optical excitations spanning from the infrared to the ultraviolet. Building on the converged analysis between experiment and theory, control of chemical reactions is established by means of optimally shaped laser pulses. This paves the road toward new applications and future challenges in this rapidly developing research field.
Inhalt
Analysis and control of small isolated molecular systems.- Complex systems in the gas phase.- Coherence and control of molecular dynamics in rare gas matrices.- Ultrafast dynamics of photoinduced processes at surfaces and interfaces.- Molecules and clusters in strong laser fields.- Vibrational dynamics of hydrogen bonds.- Observing molecular structure changes and dynamics in polar solution.- Biological systems: Applications and perspectives.