Molecular lens applied to benzene and carbon disulfide molecular beams

摘要

A molecular lens of the nonresonant dipole force formed by focusing a nanosecond IRJaser pulse has been applied to benzene and C82 molecular beams. Using the velocity map imaging technique for wolecular ray tracing, characteristic molecular lens parameters including the focal length if), minimum beam width (W), and distance to the minimum beam width position (D) were determined. The laser intensity dependence of the observed lens parameters was in good agreement with theoretical predictions. W was independent of the laser peak intensity (/0) , whereas f and D varied linearly with 1/10. The differences in lens paraIJ1eters between the molecular species were well correlated with the polari~ability per mass values of the molecules. A high chromatographic resolution of.Rs= 0.84 was ac~ieved between the images of benzene molecular beams undeflected and deflected by the lens. The possibilities for a new type of chromatography are discussed.