All-optical field-free three-dimensional orientation of asymmetric-top molecules

@article{Lin2018AllopticalFT,
  title={All-optical field-free three-dimensional orientation of asymmetric-top molecules},
  author={Kang Lin and Ilia Tutunnikov and Junjie Qiang and Junyang Ma and Qiying Song and Qinying Ji and Wenbin Zhang and Hanxiao Li and Fenghao Sun and Xiaochun Gong and Hui Li and Peifen Lu and Heping Zeng and Yehiam Prior and Ilya Sh. Averbukh and Jian Wu},
  journal={Nature Communications},
  year={2018},
  volume={9}
}
Orientation and alignment of molecules by ultrashort laser pulses is crucial for a variety of applications and has long been of interest in physics and chemistry, with the special emphasis on stereodynamics in chemical reactions and molecular orbitals imaging. As compared to the laser-induced molecular alignment, which has been extensively studied and demonstrated, achieving molecular orientation is a much more challenging task, especially in the case of asymmetric-top molecules. Here, we… 

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References

SHOWING 1-10 OF 61 REFERENCES

Impulsive orientation and alignment of quantum-state-selected NO molecules

A technique that produces significant alignment of molecules in a beam should aid a wide range of experiments geared towards understanding and controlling molecular processes in the gas phase.

Selective Orientation of Chiral Molecules by Laser Fields with Twisted Polarization.

TLDR
The presented results demonstrate generality, versatility, and robustness of this optical method for manipulating molecular enantiomers in the gas phase.

Molecular Alignment Induced by Ultrashort Laser Pulses and Its Impact on Molecular Motion

Spectroscopy aims at extracting information about matter through its interaction with light. However, when performed on gas and liquid phases as well as solid phases lacking long-range order, the

Laser-induced alignment and orientation of quantum-state-selected large molecules.

TLDR
An unprecedented degree of laser-induced one-dimensional alignment (cos;(2)theta_(2D)=0.97) and strong orientation of state-selected iodobenzene molecules are demonstrated, enabling experiments on pure samples of polar molecules in their rotational ground state.

Orienting Asymmetric Molecules by Laser Fields with Twisted Polarization.

TLDR
The mechanism behind this laser-induced orientation effect is revealed, it is shown that it is classical in nature, and envision further applications of light with twisted polarization.

Field-free orientation of CO molecules by femtosecond two-color laser fields.

TLDR
The demonstrated method can be applied to study molecular frame dynamics under field-free conditions in conjunction with a variety of spectroscopy methods, such as high-harmonic generation, electron diffraction, and molecular frame photoelectron emission.

Rotational Control of Asymmetric Molecules: Dipole- versus Polarizability-Driven Rotational Dynamics.

TLDR
The observations and analysis pave the way for orchestrated excitations by both optical and terahertz fields as complementary rotational handles that enable a plethora of new possibilities in three-dimensional rotational control of asymmetric molecules.

Transition between mechanisms of laser-induced field-free molecular orientation.

TLDR
It is proposed that careful measurements of the onset of the orientation depletion mechanism as a function of the laser intensity will provide a relatively simple route to calibrating absolute rates of nonperturbative strong-field molecular ionization.

Laser-field-free molecular orientation.

TLDR
Laser-field-free molecular orientation is demonstrated with the combination of a moderate electrostatic field and an intense nonresonant rapidly turned-off laser field, which can be shaped with the plasma shutter technique, and a new class of molecular sample has become available for various applications.

Colloquium: Aligning molecules with strong laser pulses

We review the theoretical and experimental status of intense laser alignment---a field at the interface between intense laser physics and chemical dynamics with potential applications ranging from
...