Manipulating the torsion of molecules by strong laser pulses

Phys Rev Lett. 2009 Feb 20;102(7):073007. doi: 10.1103/PhysRevLett.102.073007. Epub 2009 Feb 20.

Abstract

We demonstrate that strong laser pulses can induce torsional motion in a molecule consisting of a pair of phenyl rings. A nanosecond laser pulse spatially aligns the carbon-carbon bond axis, connecting the two phenyl rings, allowing a perpendicularly polarized, intense femtosecond pulse to initiate torsional motion accompanied by an overall rotation about the fixed axis. We monitor the induced motion by femtosecond time-resolved Coulomb explosion imaging. Our theoretical analysis accounts for and generalizes the experimental findings.