Erlangen 2022 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 30: Quantum Optics (Miscellaneous) IV
Q 30.4: Vortrag
Mittwoch, 16. März 2022, 11:30–11:45, Q-H14
Single ion wave packet super-resolution imaging — •Maurizio Verde1, Martín Drechsler2, Milton Katz2, Felix Stopp1, Sebastian Wolf1, Christian Schmiegelow2, and Ferdinand Schmidt-Kaler1 — 1QUANTUM, Institut für Physik, Universität Mainz, Germany — 2Departmento de Física, Universidad de Buenos Aires, Argentina
We present super-resolution microscopy method which enables imaging quantum wave packets of single ions in an analogous manner to STED [1]. Using hollow beams to excite single 40Ca+ ions, it has been shown recently that one can excite transitions in the beam’s dark center, where the transverse gradients can drive quadrupole transitions [2]. Conversely, here we use a hollow light beam to strongly saturate a dipole-forbidden transition |4S1/2,m=−1/2⟩ ↔ |3D5/2,m=−3/2⟩ of an ion except at a sub-diffraction limited area around the beam’s center. This beam shelves the ion into a metastable state which does not fluoresce. Next by shining a laser resonant on a dipole-allowed transition we observe scattered photons only of ions which where in this sub-diffraction limited area. This allows us to experimentally resolve about 30 nm and sense the wave packet of a single ion either Doppler or ground state cooled [3]. The theoretical estimated resolution limit of our method is few nm, which is allowing us to explore the direct imaging of non-classical quantum mechanical matter wave Fock states.
[1] S. W. Hell and J. Wichmann, Opt. Lett. 19, 780 (1994)
[2] C. T. Schmiegelow et al., Nat Commun 7, 12998 (2016)
[3] M. Drechsler et al., Phys. Rev. Lett. 127, 143602 (2021)