Sub-10-fs control of dissociation pathways in the hydrogen molecular ion with a few-pulse attosecond pulse train

Yasuo Nabekawa (), Yusuke Furukawa, Tomoya Okino, A Amani Eilanlou, Eiji J. Takahashi, Kaoru Yamanouchi and Katsumi Midorikawa
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Yasuo Nabekawa: Attosecond Science Research Team, Extreme Photonics Research Group, RIKEN Center for Advanced Photonics
Yusuke Furukawa: Attosecond Science Research Team, Extreme Photonics Research Group, RIKEN Center for Advanced Photonics
Tomoya Okino: Attosecond Science Research Team, Extreme Photonics Research Group, RIKEN Center for Advanced Photonics
A Amani Eilanlou: Attosecond Science Research Team, Extreme Photonics Research Group, RIKEN Center for Advanced Photonics
Eiji J. Takahashi: Attosecond Science Research Team, Extreme Photonics Research Group, RIKEN Center for Advanced Photonics
Kaoru Yamanouchi: Attosecond Science Research Team, Extreme Photonics Research Group, RIKEN Center for Advanced Photonics
Katsumi Midorikawa: Attosecond Science Research Team, Extreme Photonics Research Group, RIKEN Center for Advanced Photonics

Nature Communications, 2016, vol. 7, issue 1, 1-11

Abstract: Abstract The control of the electronic states of a hydrogen molecular ion by photoexcitation is considerably difficult because it requires multiple sub-10 fs light pulses in the extreme ultraviolet (XUV) wavelength region with a sufficiently high intensity. Here, we demonstrate the control of the dissociation pathway originating from the 2pσu electronic state against that originating from the 2pπu electronic state in a hydrogen molecular ion by using a pair of attosecond pulse trains in the XUV wavelength region with a train-envelope duration of ∼4 fs. The switching time from the peak to the valley in the oscillation caused by the vibrational wavepacket motion in the 1sσg ground electronic state is only 8 fs. This result can be classified as the fastest control, to the best of our knowledge, of a molecular reaction in the simplest molecule on the basis of the XUV-pump and XUV-probe scheme.

Date: 2016
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DOI: 10.1038/ncomms12835

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