Orientation of jet-cooled polar molecules with an intense single-cycle THz pulse

被引：33

作者：

Kitano, Kenta ^{[1
]}

Ishii, Nobuhisa ^{[1
]}

Kanda, Natsuki ^{[2
,3
]}

Matsumoto, Yoshiyuki ^{[1
]}

Kanai, Teruto ^{[1
]}

Kuwata-Gonokami, Makoto ^{[3
,4
]}

Itatani, Jiro ^{[1
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[2] RIKEN, Wako, Saitama 3510198, Japan

[3] Univ Tokyo, Photon Sci Ctr, Tokyo 1138656, Japan

[4] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

来源：

PHYSICAL REVIEW A | 2013年 / 88卷 / 06期

关键词：

LASER; GENERATION; ALIGNMENT; DYNAMICS; FIELDS;

D O I：

10.1103/PhysRevA.88.061405

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report the direct observation of the orientation of jet-cooled molecules induced by a THz pulse. The intense THz field (similar to 30 kV/cm) creates a superposition between the rotational ground state (J = 0) and the excited state (J = 1) of HBr molecules. The rotational dynamics is probed by Coulomb explosion 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 similar to 7 x 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 < cos theta > similar to 0.017.

引用

页数：5

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