Instantaneous generation of a vibrational wavepacket in a molecular ion is usually assumed in an ionization process. Here, by means of frequency-resolved optical gating, the authors observe a non-trivial phase modulation in a H2+molecule, which is interpreted as a ∼1-fs settling time.
- Yasuo Nabekawa
- Yusuke Furukawa
- Katsumi Midorikawa