1. Orientation of jet-cooled polar molecules with an intense single-cycle THz pulse.
- Author
-
Kenta Kitano, Nobuhisa Ishii, Natsuki Kanda, Yoshiyuki Matsumoto, Teruto Kanai, Kuwata-GonokaMakoto mi, and Jiro Itatani
- Subjects
- *
POLAR molecules , *FEMTOSECOND lasers , *SCHRODINGER equation , *PARTIAL differential equations , *WAVE packets - Abstract
We report the direct observation of the orientation of jet-cooled molecules induced by a THz pulse. The intense THz field (∼30 kV/cm) creates a superposition between the rotational ground state (J = 0) and the e×cited state (J = 1) of HBr molecules. The rotational dynamics is probed by Coulomb e×plosion imaging of the fragment ions produced by a near-infrared femtosecond laser pulse. Comparing with the simulations based on a time-dependent Schrodinger equation, the rotational wave packets are completely reconstructed, which reveal that ∼7 × 10-4 of the ground-state population is transferred to the J = 1 state at an initial temperature of 8 K, achieving a degree of orientation of (cosɵ) ∼ 0.017. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF