Molecular spinning by a chiral train of short laser pulses

  title={Molecular spinning by a chiral train of short laser pulses},
  author={Johannes Flo{\ss} and Ilya Sh. Averbukh},
  journal={Physical Review A},
We provide a detailed theoretical analysis of molecular rotational excitation by a chiral pulse train -- a sequence of linearly polarised pulses with the polarisation direction rotating from pulse to pulse by a controllable angle. Molecular rotation with a preferential rotational sense (clockwise or counter-clockwise) can be excited by this scheme. We show that the directionality of the rotation is caused by quantum interference of different excitation pathways. The chiral pulse train is… 

Laser-induced persistent orientation of chiral molecules

We study, both classically and quantum mechanically, enantioselective orientation of gas phase chiral molecules excited by laser fields with twisted polarization. Counterintuitively, the induced

Enantioselective chiral orientation induced by a combination of a long and a short laser pulse

  • Long Xu
  • Physics, Chemistry
    Physical Review A
  • 2022
Enantioselective orientation of chiral molecules excited by a shaped picosecond laser pulse and a delayed femtosecond pulse is considered. Using quantum mechanical simulations, we demonstrate a

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.

Exciting Molecules Close to the Rotational Quantum Resonance: Anderson Wall and Rotational Bloch Oscillations.

It is shown that a disturbance of the quantum resonance, either by the centrifugal distortion of the rotating molecules or a controlled detuning of the pulse train period from the so-called rotational revival time, eventually halts the growth by causing Anderson localization beyond a critical value of the angular momentum, the Anderson wall.

Visualizing molecular unidirectional rotation

A molecule can be optically accelerated to rotate unidirectionally at a frequency of a few terahertzes which is many orders higher than the classical mechanical rotor. Such a photon-induced ultrafast

Real-Time Observation of Molecular Spinning with Angular High-Harmonic Spectroscopy.

An angular high-harmonic spectroscopy method to probe the spinning dynamics of a molecular rotation wave packet in real time and can reveal additionally the electronic structure and multiple orbitals of the sampled molecule.

Direct imaging of direction-controlled molecular rotational wave packets created by a polarization-skewed double-pulse.

High-precision, time-resolved Coulomb explosion imaging of rotational wave packets in nitrogen molecules created with a pair of time-delayed, polarization-skewed femtosecond laser pulses is

Quantum unidirectional rotation directly imaged with molecules

The present approach, providing an accurate view on unidirectional rotation in quantum regime, will guide more sophisticated molecular manipulations by utilizing its capability in capturing highly structured spatiotemporal evolution of molecular wave packets.

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,

Enantioselective orientation of chiral molecules induced by terahertz pulses with twisted polarization

Chirality and chiral molecules are key elements in modern chemical and biochemical industries. Individual addressing, and the eventual separation of chiral enantiomers has been and still is an



Directional spinning of molecules with sequences of femtosecond pulses

We present an analysis of two experimental approaches to controlling the directionality of molecular rotation with ultrashort laser pulses. The two methods are based on the molecular interaction with

Nonlinear optics.

In this method, non-linear susceptibility tensors are introduced which relate the induced dipole moment to a power series expansion in field strengths and the various experimental observations are described and interpreted in terms of this formalism.

Molecular Spectra and Molecular Structure

THOSE who contributed to the recent Faraday Discussion on molecular spectra and molecular structure have now sent their written versions to the secretary for publication. Instead of the report we

A and V

Rotational Spectroscopy of Diatomic Molecules

1. General introduction 2. The separation of nuclear and electronic motion 3. The electronic hamiltonian 4. Interactions arising from nuclear magnetic and electric moments 5. Angular momentum theory


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