Doubly-resonant sum-frequency generation for surface studies

By: M. B. Raschke, M. Hayashi, S. H. Lin, and Y. R. Shen

Chemical Physics Letters 359, 367 (2002)

Doubly-resonant infrared–visible sum-frequency generation (DR-SFG) as a two-dimensional surface spectroscopy was demonstrated experimentally for the first time. Probing electronic and vibrational transitions of a surface molecular monolayer simultaneously, the technique gives access to information about the electron-vibration coupling of the surface molecules. It allows selective studies of any interface accessible by light.