Lighting the Landscape: Molecular Events Under Dynamic Stark Shifts

TL;DR

This paper reviews how strong laser pulses can manipulate molecular structures and reactions through light-induced potentials, enabling control over photodissociation and photochemical processes.

Contribution

It introduces a new perspective on controlling molecular dynamics using light-induced potential energy surfaces distorted by strong laser fields.

Findings

Light-induced avoided crossings enable control of molecular geometry.

Stark shifts can be used to manipulate charge redistribution.

Theoretical proposals demonstrate control over molecular reactions.

Abstract

A new perspective on how to manipulate molecules by means of very strong laser pulses is emerging with insights from the so-called light-induced potentials, which are the adiabatic potential energy surfaces of molecules severely distorted by the effect of the strong field. Different effects appear depending on how the laser frequency is tuned, to a certain electronic transition, creating light-induced avoided crossings, or very off-resonant, generating Stark shifts. In the former case it is possible to induce dramatic changes in the geometry and redistribution of charges in the molecule while the lasers are acting and to fully control photodissociation reactions as well as other photochemical processes. Several theoretical proposals taken from the work of the authors are reviewed and analyzed showing the unique features that the strong-laser chemistry opens to control the transient properties and the dynamics of molecules.