Strong laser field control of fragment spatial distributions from a photodissociation reaction

Corrales, María Elena; Nalda, R. de; Bañares, Luis

doi:10.1038/s41467-017-01139-6

Cited by 33 publications

(28 citation statements)

References 42 publications

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“…We consider a set of initial conditions in the same way as in Fig. 6 and we look at the subset which holds the criterion (15) or an approximate negative energy criterion. In Fig.…”

Section: B Results From a Static Approximationmentioning

confidence: 99%

Formation of RbCs dimers using an elliptically polarized laser pulse

Chandre

Salas

2019

Phys. Rev. A

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We consider the formation of RbCs by an elliptically polarized laser pulse. By varying the ellipticity of the laser for sufficiently large laser intensity, we see that the formation probability presents a strong dependence, especially around ellipticity 1/ √ 2. We show that the analysis can be reduced to the investigation of the long-range interaction between the two atoms. The formation is mainly due to a small momentum shifts induced by the laser pulse. We analyze these results using the Silberstein's expressions of the polarizabilities, and show that the ellipticity of the field acts as a control knob for the formation probability, allowing significant variations of the dimer formation probability at a fixed laser intensity, especially in the region around an ellipticity of 1/ √ 2.

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“…We consider a set of initial conditions in the same way as in Fig. 6 and we look at the subset which holds the criterion (15) or an approximate negative energy criterion. In Fig.…”

Section: B Results From a Static Approximationmentioning

confidence: 99%

Formation of RbCs dimers using an elliptically polarized laser pulse

Chandre

Salas

2019

Phys. Rev. A

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“…Alternatively called dynamic Stark control 28 , this recently introduced method uses acutely timed off-resonant pulses of light to act as a catalyst in intramolecular bond-breaking reactions. Thus far, this type of photonic catalysis has successfully been used in photochemical dissociation reactions of diatomics 29 , polyatomics 30,31 , and phenol 32 . As noted earlier, the photonic mechanism for the dynamic Stark shift harnessed in these reactions is simply forward Rayleigh scattering -which, as we have seen, is the same passive mechanism behind the gradient force in optical trapping.…”

Section: Role Of Optical Catalysis In Chemical Sciencesmentioning

confidence: 99%

Passive laser irradiation as a tool for optical catalysis

Forbes

Andrews

2020

Nanophotonics VIII

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The mechanisms of absorption, emission, and scattering of photons form the foundations of optical interactions between light and matter. In the vast majority of such interactions there is a significant interplay and energy exchange between the radiation field and the material components. In absorption for example, modes of the field are depopulated by photons whose energy is at resonance with a molecular transition producing excited material states. In all such optical phenomena, the initial state of the radiation field differs in mode occupation to its final state. However, certain optical processes can involve off-resonance laser beams that are unchanged on interaction with the material: the output light, after interaction, is identical to the laser input. Such off-resonance interactions include forward Rayleigh scattering, responsible for the wellknown gradient force in optical trapping, and the laser-induced intermolecular interaction commonly termed optical binding; in both processes, an intense beam delivers its effect without suffering change. It is possible for beams detuned from resonance to provide not only techniques for optomechanical and optical manipulation, but also to passively influence other important and functional interactions such as absorption from a resonant beam, or energy transfer. Such effects can be grouped under the banner of 'optical catalysis', since they can significantly influence resonant processes. Furthermore, off-resonance photonics affords a potential to impact on chemical interactions, as in the passive modification of rotational constants and phase transitions. To date, apart from optical manipulation, the potential applicability of passive photonics, particularly in the realm of chemical physics and materials science, has received little attention. Here we open up this field, highlighting the distinct and novel role that off-resonance laser beams and the ensuing photonics can play.

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“…A great deal of effort has been devoted to investigating the A-band photodissociation of methyl iodide, both experimentally 27,[36][37][38][39][40][41][42][43][44][45][46] and theoretically. 43,44,[47][48][49][50][51][52][53][54][55][56][57][58][59] In brief, the absorption spectrum associated with this band involves excitation from the ground electronic state X 1 A 1 to the three excited states 3 Q 0 , 1 Q 1 , and 3 Q 1 (in Mulliken's notation 60 ).…”

Section: Introductionmentioning

confidence: 99%