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

  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},
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… 

Field-free molecular orientation by delay- and polarization-optimized two fs pulses

This study shows that the alignment and orientation can be very well synchronized temporally because the crossed field does not disturb the preformed alignment modulation significantly, suggesting that the molecules are very well confined in the laboratory frame.

Spatiotemporal rotational dynamics of laser-driven molecules

Abstract. Molecular alignment and orientation by laser fields has attracted significant attention in recent years, mostly due to new capabilities to manipulate the molecular spatial arrangement.

Three dimensional orientation of small polyatomic molecules excited by two-color femtosecond pulses

We study the excitation of asymmetric-top (including chiral) molecules by two-color femtosecond laser pulses. In the cases of non-chiral asymmetric-top molecules excited by an orthogonally polarized

Alignment-dependent ionization of nonlinear triatomic molecules in strong laser fields

  • Zhen ChenF. He
  • Chemistry, Physics
    Journal of the Optical Society of America B
  • 2019
The alignment- and channel-resolved ionization of the triatomic nonlinear molecules SO2 and H2O in strong fields has been studied using the strong-field approximation theory. When the instantaneous

Observation of persistent orientation of chiral molecules by a laser field with twisted polarization

Molecular chirality is an omnipresent phenomenon of fundamental significance in physics, chemistry, and biology. For this reason, the search for various techniques for enantioselective control,

Echo-enhanced molecular orientation at high temperatures

Ultrashort laser pulses are widely used for transient field-free molecular orientation – a phenomenon important in chemical reaction dynamics, ultrafast molecular imaging, high harmonics generation,

Evolution of the rotational quantum state in field-free molecular alignment and orientation

We consider time-dependent evolution of the field-free molecular alignment and orientation for different rotational quantum states, induced by a single- and dual-color femtosecond laser pulses. We

Long-Lasting Orientation of Symmetric-Top Molecules Excited by Two-Color Femtosecond Pulses

Impulsive orientation of symmetric-top molecules excited by two-color femtosecond pulses is considered. In addition to the well-known transient orientation appearing immediately after the pulse and



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.

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.

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.

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.

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.

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.

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.

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