293 citations · 1.6k across the 43 of their papers we have counts for
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Excitation of an Atomic Transition with a Vortex Laser Beam
Christian T. Schmiegelow, Jonas Schulz, Henning Kaufmann +3
Photons carry one unit of angular momentum associated with their spin~\cite{Beth1936}. Structured vortex beams carry additional orbital angular momentum which can also be transferr…
Phase-stable free-space optical lattices for trapped ions
Christian Tomas Schmiegelow, Henning Kaufmann, Thomas Ruster +5
We demonstrate control of the absolute phase of an optical lattice with respect to a single trapped ion. The lattice is generated by off-resonant free-space laser beams, we activel…
Measurement of dipole matrix elements with a single trapped ion
M. Hettrich, T. Ruster, H. Kaufmann +4
We demonstrate a new method for the direct measurement of atomic dipole transition matrix elements based on techniques developed for quantum information purposes. The scheme consis…