Time-resolved high-harmonic spectroscopy of ultrafast photoisomerization dynamics

Time-resolved high-harmonic spectroscopy of nonadiabatic dynamics in NO2

P. M. Kraus,1 Y. Arasaki,2 J. B. Bertrand,3 S. Patchkovskii,3 P. B. Corkum,3 D. M. Villeneuve,3 K. Takatsuka,2 and H. J. Wörner1,* 1Laboratorium für Physikalische Chemie, ETH Zürich, Wolfgang-Pauli-Strasse 10, 8093 Zürich, Switzerland 2Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba 153-8902, Tokyo, Japan 3Joint Attosecond Science Laboratory, N...

Ultrafast Time-Resolved Spectroscopy

Time-resolved spectroscopy of ultrafast photoisomerization of octopus rhodopsin under photoexcitation.

A primary process in vision is the cis-trans photoisomerization of a chromophore of rhodopsin, called retinal. In the present work, we have performed ultrafast time-resolved spectroscopy of octopus rhodopsin using a sub-5-fs pulse laser. In comparison with our previous study on bacteriorhodopsin, we found that octopus rhodopsin follows similar dynamics after photoexcitation but with different t...

Structural dynamics of photochemical reactions probed by time-resolved photoelectron spectroscopy using high harmonic pulses.

Femtosecond ring-opening dynamics of 1,3-cyclohexadiene (CHD) in gas phase upon two-photon excitation at 400 nm (=3.1 eV) was investigated by time-resolved photoelectron spectroscopy using 42 nm (=29.5 eV) high harmonic photons probing the dynamics of the lower-lying occupied molecular orbitals (MOs), which are the fingerprints of the molecular structure. After 500 fs, the photoelectron intensi...

Time-resolved dynamics in N2O4 probed using high harmonic generation.

The attosecond time-scale electron-recollision process that underlies high harmonic generation has uncovered extremely rapid electronic dynamics in atoms and diatomics. We showed that high harmonic generation can reveal coupled electronic and nuclear dynamics in polyatomic molecules. By exciting large amplitude vibrations in dinitrogen tetraoxide, we showed that tunnel ionization accesses the g...