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Updated: Aug 7, 2026

Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy
Published on: December 1, 2023
Imaging the mode-selected predissociation of OCS+[(v1v2v3)B2 Sigma+]
Chushuan Chang1, Chu-Yung Luo, Kopin Liu
1Institute of Atomic and Molecular Sciences (IAMS), Academia Sinica, P.O. Box 23-166, Taipei, Taiwan 106.
Abstract:
A new experimental approach to explore the mode-selected chemistry is proposed and demonstrated here. In this approach a double-resonance excitation scheme is exploited to prepare a well-defined mode or state of a parent ion. A time-sliced velocity imaging technique interrogates the fragment ion from the subsequent predissociation. Application to the title process reveals remarkable mode-specific behaviors despite the long dissociation time associated with the indirect bond-breaking process. A qualitative interpretation of the major findings is surmised.
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