Retrieving Molecular Structural Information and Tracking HNC/HCN Isomerization Process with High Harmonic Generation by Ultrashort Laser Pulses

Nguyen Ngoc Ty, Le Van Hoang, Vu Ngoc Tuoc, Le Anh Thu


We investigate the possibility of applying the iterative method,
suggested in our previous work, for HCN molecule and its HNC
isomer. We found that the high-order harmonic generation (HHG)
spectra are quite insensitive to the change of H-C (or H-N) bond
length so that only the inter-nuclear C-N distance can be
retrieved from the high-order harmonic spectra using ultrashort
intense lasers. Furthermore, by analyzing the HHG spectra emitted
by HCN during the chemical reaction path of isomerization we
identify the intensity peaks nearby the stable, meta-stable and
transition states. This finding can be useful for tracking the
HNC/HCN isomerization process.

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