Rostock 2019 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 42: Poster: Quantum Optics and Photonics II
Q 42.1: Poster
Wednesday, March 13, 2019, 16:15–18:15, S Atrium Informatik
Excitation of E1-forbidden Atomic Transitions with Electric, Magnetic or Mixed Multipolarity in Light Fields Carrying Orbital and Spin Angular Momentum — •Ferdinand Schmidt-Kaler1, Maria Solyanik-Gorgone2, Andrei Afanasev2, Carl Carlson3, and Christian Schmiegelow4 — 1QUANTUM, Inst. für Physik, Univ. Mainz — 2Staudinger Weg 7 — 3Department of Physics, The College of William and Mary in Virginia, Williamsburg, VA 23187, USA — 4Departamento de Fisica, FCEyN, UBA and IFIBA, Conicet, Pabellon 1, Ciudad Universitaria, 1428 Buenos Aires, Argentina
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 40Ca+ ions for varying polarizations[1,2]. We further develop the photo-absorption formalism [3] 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 40Ar13+, E3-driven 171Yb+ and 172Yb+, and B-like 20Ne5+ are presented. The latter case displays novel effects, coming from the presence of a strong photon - magnetic dipole coupling.
Ref.: [1] Schmiegelow et al, Nat. Comm. 7, 12998 (2016) [2] Afanasev et al, New J. Phys. 20, 023032 (2018) [3] arxiv 1811.05871