Abstract
We report initial studies of cluster desorption from wide bandgap dielectrics using an infrared, picosecond free‐electron laser. Clusters of (KnIn+1)+ with masses as large as 630 amu were observed for laser wavelengths near 3.0 μm. Infrared laser ablation of Rb:borate glass between 3.0 and 4.6 μm wavelength yields several species of positive ions with masses up to 340 amu. The strong wavelength dependence points to vibrationally resonant processes as one possible mechanism leading to ejection of clusters.
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