The Role of the Gouy Phase in the Coherent Phase Control of the Photoionization and Photodissociation of Vinyl Chloride

We demonstrate theoretically and experimentally that the Gouy phase of a focused laser beam may be used to control the photo-induced reactions of a polyatomic molecule. Quantum mechanical interference between one- and three-photon excitation of vinyl chloride produces a small phase lag between the dissociation and ionization channels on the axis of the molecular beam. Away from the axis, the Gouy phase introduces a much larger phase lag that agrees quantitatively with theory without any adjustable parameters.Comment: 4 pages, 4 figure

Effect of the Gouy phase on the coherent phase control of chemical reactions.

Effect of the Gouy phase on the coherent phase control of chemical reactions

Theoretical investigations on structure, electrostatic potentials and vibrational frequencies of diglyme and Li<SUP>+</SUP>-(diglyme) conformers

The trends for cation binding for several conformers of diglyme are predicted by mapping the topography of the molecular electrostatic potential (MESP) at the Hartree-Fock (HF) level. Different Li<SUP>+</SUP>-(diglyme) geometries derived by exploiting the MESP cooperative effects are used subsequently in ab initio computations. The binding energies for Li<SUP>+</SUP> with diglyme have been calculated in mono-, bi- and tridentate coordinations by employing the HF, second-order Møller-Plesset (MP2) and the hybrid density functional methods. The calculated vibrational spectrum of Li<SUP>+</SUP>-(diglyme) also points to a gauche conformation of diglyme in the complex

Adsorption of water on sodium chloride surfaces: electrostatics - guided ab initio studies

Water adsorption is studied on medium-sized clusters of sodium chloride representing (100) and (110) surfaces at the ab initio level. Topographical features of molecular electrostatic potential (MESP) have been employed for predicting the potent sites for binding of one to four water molecules on these surfaces. Such guess geometries are initially optimized using an electrostatics-based model, electrostatic potential for intermolecular complexation (EPIC) and further at the Hartree-Fock and B3LYP/6-31G(d, p) levels. The corresponding interaction energies are examined for assessing co-operative binding effects. The geometry and interaction energy of four water molecules adsorbed on NaCl(100) clearly brings out the co-operative binding among the water molecules. Further, water binding to (110) surface is stronger than that with (100) surface. This is also in confirmation with the electrostatic properties of (110) surface. Many-body decomposition analysis brings out the stronger interaction between NaCl clusters with water molecules vis-a-vis water-water interaction

Role of the Gouy phase in the coherent phase control of the photoionization and photodissociation of vinyl chloride

We demonstrate theoretically and experimentally that the Gouy phase of a focused laser beam may be used to control the photoinduced reactions of a polyatomic molecule. Quantum mechanical interference between one- and three-photon excitation of vinyl chloride produces a small phase lag between the dissociation and ionization channels on the axis of the molecular beam. Away from the axis, the Gouy phase introduces a much larger phase lag that agrees quantitatively with theory without any adjustable parameters