S H Lin's Advances in Multi-Photon Processes and Spectroscopy: (Volume PDF

By S H Lin

This quantity offers contemporary growth and views in multi-photon strategies and spectroscopy of atoms, ions, molecules and solids. the topics within the sequence hide the experimental and theoretical investigations within the interdisciplinary learn fields of ordinary technology together with chemistry, physics, bioscience and fabric technology.

This quantity is the newest quantity in a sequence that may be a pioneer in compiling overview articles of nonlinear interactions of photons and subject. It has made an important contribution to the improvement and merchandising of the similar examine fields. In view of the quick progress in multi-photon strategies and multi-photon spectroscopy, care has been taken to make sure that the overview articles inside the sequence are readable not just by means of energetic researchers but additionally people who are now not but specialists yet intend to go into the sphere.

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Extra resources for Advances in Multi-Photon Processes and Spectroscopy: (Volume 21)

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As a consequence, the potentials are not only shifted but reshaped under the effect of the electric field creating a new set of potentials, the so-called Light Induced Potentials (LIPs) or dressed states. 30) where DI is the diagonal matrix containing the energies of the new LIPs (denoted V+ and V− here) and Z represents the composition of these new electronic potentials in the original, bare state, picture. The effects on the LIPs’ properties for different field amplitudes ε0 are shown in Fig.

14. Fourier transform amplitude at the V1 bending frequency for pulses of different duration (obtained by second-order chirp). The amplitude decreases for stronger and/or longer fields, indicating a decrease of the modulation depth of the parent ion yield, as expected for photon locking. Theory (left panel) and experiment (right panel) qualitatively agree. In the simulations, the increase in modulation depth with field strength for the shortest control pulse duration is an artifact of the simple model used to describe the ionization process.

4. 1. Phase-dependent dissociation Joint experimental and theoretical investigations on dihalomethane molecules have made it possible to demonstrate various phenomena related to strong-field excitations. One of these is the phase-dependent dissociation, observed for CH2 BrI+ in pump-probe measurements. , on the spatially varying phase — of the wavepacket rather than on the position of the wavepacket. The process is explained schematically in Figs. 9(a) and 9(b), Depending on the direction of wavepacket propagation on the lower state (Vl ) relative to the slopes of the potentials, the laser field does or does not have the chance to de-excite the previously excited molecule: In case (a), the excited wavepacket slows down on the excitedstate potential (Vu ) and returns back to the resonance region.

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