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arXiv · 1811.05871

Excitation of E1-forbidden Atomic Transitions with Electric, Magnetic or Mixed Multipolarity in Light Fields Carrying Orbital and Spin Angular Momentum

Maria Solyanik-Gorgone·Andrei Afanasev·Carl E. Carlson·Christian T. Schmiegelow·Ferdinand Schmidt-Kaler
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Abstract

Photons carrying a well-defined orbital angular momentum have been proven to modify spectroscopic selection rules in atomic matter. Excitation profiles of electric quadrupole transitions have been measured with single trapped $^{40}$Ca$^+$ ions for varying polarizations. We further develop the photo-absorption formalism to study the case of arbitrary alignment of the beam's optical axis with respect to the ion's quantization axis and mixed multipolarity. Thus, predictions for M1-dominated $^{40}Ar^{13+}$, E3-driven $^{171}Yb^+$ and $^{172}Yb^+$, and B-like $^{20}Ne^{5+}$ are presented. The latter case displays novel effects, coming from the presence of a strong photon -- magnetic dipole coupling.

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Maria Solyanik-Gorgone, Andrei Afanasev, Carl E. Carlson, Christian T. Schmiegelow, Ferdinand Schmidt-Kaler. 2019-01-10. Excitation of E1-forbidden Atomic Transitions with Electric, Magnetic or Mixed Multipolarity in Light Fields Carrying Orbital and Spin Angular Momentum. https://doi.org/10.1364/josab.36.000565

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