Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 22: Posters: Quantum Optics and Photonics II

Q 22.25: Poster

Tuesday, March 10, 2020, 16:30–18:30, Empore Lichthof

Implementation of Optical Tweezers in a Small Scale Cavity-QED Setup — •Saibin Zhou, Bo Wang, Nicolas Tolazzi, Christopher Ianzano, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany

Optical tweezers with the capability to manipulate single atoms have recently been achieved[1][2]. Here we seek to implement the microscopic optical tweezers method in our strongly-coupled atom-cavity system and manipulate the spatial position of individual ⁸⁷Rb atoms trapped in an optical lattice. To have control over the exact locations of atoms within the cavity is crucial, as the coupling strength between the electromagnetic field mode and the atom depends heavily on position. This is especially important in our case where we have a strong atom-cavity coupling on both the D₁ and D₂ lines of ⁸⁷Rb, requiring an independent longitudinal mode of the cavity for each transition[3]. Having precise control over the position of an atom within the cavity would therefore allow for tuning of each coupling strength independently. It also provides the ability to manipulate multiple atoms individually and simultaneously. Compared to a tweezers setup in free space, our system has very limited optical access due to the proximity of the Fabry-Pérot mirrors. Therefore, we present a special design for our optical tweezers system together with detailed results.
[1] Daniel Barredo et al., Science, 354, 1021(2016).
[2] Manuel Endres et al., Science, 354, 1024(2016).
[3] Christoph Hamsen et al., Nature Physics, 14, 885(2018).