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Strong field laser control of photochemistry

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TLDR
This Perspective examines the current strategies developed to achieve control of chemical processes with strong laser fields, as well as recent experimental advances that demonstrate that properties like the molecular absorption spectrum, the state lifetimes, the quantum yields and the velocity distributions in photodissociation processes can be controlled by the introduction of carefully designed strong Laser fields.
Abstract
Strong ultrashort laser pulses have opened new avenues for the manipulation of photochemical processes like photoisomerization or photodissociation. The presence of light intense enough to reshape the potential energy surfaces may steer the dynamics of both electrons and nuclei in new directions. A controlled laser pulse, precisely defined in terms of spectrum, time and intensity, is the essential tool in this type of approach to control chemical dynamics at a microscopic level. In this Perspective we examine the current strategies developed to achieve control of chemical processes with strong laser fields, as well as recent experimental advances that demonstrate that properties like the molecular absorption spectrum, the state lifetimes, the quantum yields and the velocity distributions in photodissociation processes can be controlled by the introduction of carefully designed strong laser fields.

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Citations
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Non-perturbative Quantum Control via the Non-resonant Dynamic Stark Effect

TL;DR: In this paper, infrared control pulses are used to modify the field-free dynamical evolution during traversal of the avoided crossing, thus controlling the nonadiabatic branching ratio.
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Competition between Light-Induced and Intrinsic Nonadiabatic Phenomena in Diatomics

TL;DR: The equivalence of using the cavity's quantized field and the classical laser field as usually done for molecules is demonstrated and a significant difference between the impact of the laser-induced avoided crossing and that of the LICI on the dynamics of the molecule is undoubtedly demonstrated.
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Strong laser field control of fragment spatial distributions from a photodissociation reaction.

TL;DR: This work demonstrates for the case of methyl iodide that when a molecular bond breaking process takes place in the presence of an intense infrared laser field, its stereodynamics is profoundly affected, and that the intensity of this laser field can be used as an external knob to control it.
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Towards controlling the dissociation probability by light-induced conical intersections

TL;DR: In this paper, the authors exploit this finding and perform calculations using chirped laser pulses in which the time dependence of the laser frequency is designed so as to force the LICI to move together with the field-free vibrational wave packet as much as possible.
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Intrinsic and light-induced nonadiabatic phenomena in the NaI molecule.

TL;DR: Results undoubtedly demonstrate that the effect of the LIAC and LICI on the dynamics strongly depends on the intensity and the frequency of the applied laser field as well as the permanent dipole moments of the molecule.
References
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Journal ArticleDOI

Coherent population transfer among quantum states of atoms and molecules

TL;DR: In this paper, the authors discuss the technique of stimulated Raman adiabatic passage (STIRAP), a method of using partially overlapping pulses (from pump and Stokes lasers) to produce complete population transfer between two quantum states of an atom or molecule.
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Femtochemistry: Atomic-Scale Dynamics of the Chemical Bond†

TL;DR: The field of femtochemistry has been studied from a personal perspective, encompassing our research at Caltech and focusing on the evolution of techniques, concepts, and new discoveries.
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Control of Chemical Reactions by Feedback-Optimized Phase-Shaped Femtosecond Laser Pulses

TL;DR: Tailored femtosecond laser pulses from a computer-controlled pulse shaper were used to optimize the branching ratios of different organometallic photodissociation reaction channels, showing that two different bond-cleaving reactions can be selected, resulting in chemically different products.
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Colloquium: Aligning molecules with strong laser pulses

TL;DR: In this paper, the theoretical and experimental status of the intense laser alignment (EL alignment) technique is reviewed and a discussion of the physics underlying this technique and a description of methods of observing it in the laboratory is provided.
Journal ArticleDOI

Teaching lasers to control molecules.

TL;DR: This work simulates an apparatus that learns to excite specified rotational states in a diatomic molecule and uses a learning procedure to direct the production of pulses based on fitness'' information provided by a laboratory measurement device.
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