Abstract
A strong adiabatic mixed-field orientation (Nup /Ntot =0.882) of carbonyl sulfide (OCS) molecules in their absolute ground state is experimentally demonstrated. OCS is oriented in a combination of nonresonant laser and static electric fields inside a two-plate velocity map imaging spectrometer. The transition from nonadiabatic to adiabatic orientation for the rotational ground state is studied by varying the applied laser intensity and static electric field. Above static electric field strengths of 10 kV cm-1 and laser intensities of 1011 W cm-2 the observed degree of orientation reaches a plateau. These results are in good agreement with computational solutions of the time-dependent Schrödinger equation.
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