Impulsive laser induced alignment of molecules dissolved in helium nanodroplets

Phys Rev Lett. 2013 Mar 1;110(9):093002. doi: 10.1103/PhysRevLett.110.093002. Epub 2013 Mar 1.

Abstract

We show that a 450 fs nonresonant, moderately intense, linearly polarized laser pulse can induce field-free molecular axis alignment of methyliodide (CH(3)I) molecules dissolved in a helium nanodroplet. Time-resolved measurements reveal rotational dynamics much slower than that of isolated molecules and absence of the sharp transient alignment recurrences characteristic of gas phase molecules. Our results presage a range of new opportunities for exploring both molecular dynamics in a dissipative environment and the properties of He nanodroplets.