Laser-induced alignment dynamics of HCN: Roles of the permanent dipole moment and the polarizability

Dion, Claude M.; Keller, A.; Atabek, O.; Bandrauk, André D.

doi:10.1103/physreva.59.1382

Cited by 146 publications

(72 citation statements)

References 25 publications

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“…The process of alignment is modeled by considering a rotor in a time dependent E field [13]. In this case the interaction Hamiltonian is given by H I = -µ.E where µ = µ 0 + 1 2 αE + 1 24 γEE.…”

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confidence: 99%

Propensity of molecules to spatially align in intense light fields

Banerjee¹,

Mathur²,

Kumar³

2001

Phys. Rev. A

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The propensity of molecules to spatially align along the polarization vector of intense, pulsed light fields is related to readily-accessible parameters (molecular polarizabilities, moment of inertia, peak intensity of the light and its pulse duration). Predictions can now be made of which molecules can be spatially aligned, and under what circumstances, upon irradiation by intense light. Accounting for both enhanced ionization and hyperpolarizability, it is shown that all molecules can be aligned, even those with the smallest static polarizability, when subjected to the shortest available laser pulses (of sufficient intensity).

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mentioning

confidence: 99%

Propensity of molecules to spatially align in intense light fields

Banerjee¹,

Mathur²,

Kumar³

2001

Phys. Rev. A

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“…Dion et al [57] report experimental values of 13.28 and 21. It is worth noticing that, in experimental determinations of adiabatic polarizabilities based on deflection of molecular beams in inhomogenous electric fields, structural relaxation would have a slight but observable influence on the polarization of HCN when the field is aligned onto the longitudinal axis (z-axis) of this molecule (Table 9).…”

Section: Hydrogen Cyanide (Hcn)mentioning

confidence: 99%

Many-body calculations of molecular electric polarizabilities in asymptotically complete basis sets

2011

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International audienceThe static dipole polarizabilities of Ne, CO, N2, F2, HF, H2O, HCN, and C2H2 (acetylene) have been determined close to the Full-CI limit along with an asymptotically complete basis set (CBS), according to the principles of a Focal Point Analysis. In this purpose we employed the results of Finite Field calculations up to the level of Coupled Cluster theory including Single, Double, Triple, Quadruple and perturbative Pentuple excitations [CCSDTQ(P)], in conjunction with suited extrapolations of energies obtained using augmented and doubly-augmented Dunning's correlation consistent polarized valence basis sets of improving quality. The polarizability characteristics of C2H4 (ethylene) and C2H6 (ethane) have been determined on the same grounds at the CCSDTQ level in the CBS limit. Comparison is made with results obtained using lower levels in electronic correlation, or taking into account the relaxation of the molecular structure due to an adiabatic polarization process. Vibrational corrections to electronic polarizabilities have been empirically estimated according to Born-Oppenheimer Molecular Dynamical simulations employing Density Functional Theory. Confrontation with experiment ultimately indicates relative accuracies of the order of 1 to 2 %

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“…The functions α ,⊥ (R) are the parallel and the perpendicular molecular polarizabilities [44]. The pulse envelope g(t) contains a ramp-up, a plateau and a ramp-down with durations T ru , T p and T rd , respectively, and its profile is taken to be [41] …”

Section: The Hamiltonian Of the Systemmentioning

confidence: 99%

Driving the formation of the RbCs dimer by a laser pulse: A nonlinear-dynamics approach

2017

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We study the formation of the RbCs molecule by an intense laser pulse using nonlinear dynamics.Under the Born-Oppenheimer approximation, the system is modeled by a two degree of freedom rovibrational Hamiltonian, which includes the ground electronic potential energy curve of the diatomic molecule and the interaction of the molecular polarizability with the electric field of the laser. As the laser intensity increases, we observe that the formation probability first increases and then decreases after reaching a maximum. We show that the analysis can be simplified to the investigation of the long-range interaction between the two atoms. We conclude that the formation is due to a very small change in the radial momentum of the dimer induced by the laser pulse.From this observation, we build a reduced one dimensional model which allows us to derive an approximate expression of the formation probability as a function of the laser intensity.

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Laser-induced alignment dynamics of HCN: Roles of the permanent dipole moment and the polarizability

Cited by 146 publications

References 25 publications

Propensity of molecules to spatially align in intense light fields

Propensity of molecules to spatially align in intense light fields

Many-body calculations of molecular electric polarizabilities in asymptotically complete basis sets

Driving the formation of the RbCs dimer by a laser pulse: A nonlinear-dynamics approach

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