Selection rules for atomic excitation by twisted light

Duan, Y.; Müller, R. A.; Surzhykov, A.

doi:10.1088/1361-6455/ab3631

Cited by 9 publications

(5 citation statements)

References 34 publications

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“…These transformations or symmetry relations do not depend on the radial distance of the atoms from the beam axis. Hence, the selection rules for photo-excitation of atoms by twisted light beams are not position dependent as inferred in the previous works [36][37][38].…”

Section: Interaction Of Lg Beams With the Target Atomsupporting

confidence: 53%

Photoexcitation of atoms by cylindrically polarized Laguerre-Gaussian beams

Ramakrishna,

Hofbrucker,

Fritzsche

2021

Preprint

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We analyze the photo-excitation of atoms by cylindrically polarized Laguerre-Gaussian beams within the framework of the first-order perturbation theory. To perform this analysis, we expand the vector potential of Laguerre-Gaussian beam in terms of its multipole components. For cylindrically polarized Laguerre-Gaussian beams, in particular, we show that the (magnetic) sub-components of the electric-quadrupole field vary significantly with the beam waist and radial distance in the beam cross section. We discuss the influence of multipole distribution on the transfer of total angular momentum from the Laguerre-Gaussian beam to an atom with a single electron in the valence shell. Furthermore, we explicitly show that the transition between the magnetic sub-levels of the target atom can be readily explained using the multipole distribution of the Laguerre-Gaussian beams.

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Section: Interaction Of Lg Beams With the Target Atomsupporting

confidence: 53%

Photoexcitation of atoms by cylindrically polarized Laguerre-Gaussian beams

Ramakrishna,

Hofbrucker,

Fritzsche

2021

Preprint

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“…Using the expression for the light field (12) in terms of regular spherical harmonics, we can separate the CM and electric coordinates.…”

Section: Theoretical Model Of the Vortex Light Induced Transitionmentioning

confidence: 99%

“…Unlike works [7][8][9][10] which mainly focus on the interaction between the light * Author to whom any correspondence should be addressed. and the external 'atomic-type' motion, features of angular momentum exchange between the vortex light and the internal 'electric-type' transition has attracted much interest in recent years [11,12].…”

Section: Introductionmentioning

confidence: 99%

The vortex light induced electric dipole and electric quadru-pole transition in Ca atom

Lu,

Liu,

Feng

et al. 2023

Laser Phys.

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The Laguerre–Gaussian beam induced electric transition model is presented. The major mechanism of angular momentum exchange between the light and the atomic system is discussed. The influence of the topological charge on the transition probability and selection rules is obtained. Our results show that the Ca(4s2 1S0–4s3d 1D2) electric quadrupole transition selection rules are sensitive to the sign of l, and the center of mass transition selection rules are governed by the topological charge l of the light. The electric dipole transition is possible in a field with topological charge l > 0, and the quadrupole transition is no longer forbidden. The overall transition probability difference between dipole transition and quadrupole transition can be decreased by the joint action of the light angular momentum exchange with the external and the internal motion.

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“…Theoretical investigation of this process began almost two decades ago [128], leading to its experimental demonstration in [129]. Position-dependent modifications of the atomic transition selection rules were further investigated in [130,131,132,133,134]. Excitation [135,136] and ionization of atoms [105,137,138] and molecules [139] by twisted photons, including two-photon ionization with a combination of twisted and plane-wave photons [140], as well as scattering of twisted light by atoms [141], were also theoretically explored.…”

Section: Vortex States For Atomic Physicsmentioning

confidence: 99%

Promises and challenges of high-energy vortex states collisions

Ivanov

2022

Preprint

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Vortex states of photons, electrons, and other particles are non-plane-wave solutions of the corresponding wave equation with helicoidal wave fronts. These states possess an intrinsic orbital angular momentum with respect to the average propagation direction, which represents a new degree of freedom, previously unexplored in particle or nuclear collisions.Vortex states of photons, electrons, neutrons, and neutral atoms have been experimentally produced, albeit at low energies, and are being intensively explored. Anticipating future experimental progress, one can ask what additional insights on nuclei and particles one can gain once collisions of high-energy vortex states become possible. This review describes the present-day landscape of physics opportunities, experimental progress and suggestions relevant to vortex states in high energy collisions. The aim is to familiarize the community with this emergent cross-disciplinary topic and to provide a sufficiently complete literature coverage, highlighting some results and calculational techniques.

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Selection rules for atomic excitation by twisted light

Cited by 9 publications

References 34 publications

Photoexcitation of atoms by cylindrically polarized Laguerre-Gaussian beams

Photoexcitation of atoms by cylindrically polarized Laguerre-Gaussian beams

The vortex light induced electric dipole and electric quadru-pole transition in Ca atom

Promises and challenges of high-energy vortex states collisions

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