Erlangen 2022 – scientific programme
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A: Fachverband Atomphysik
A 20: Precision spectroscopy of atoms and ions (joint session A/Q)
A 20.7: Poster
Wednesday, March 16, 2022, 16:30–18:30, P
Enhancing Atom-photon Interaction with Integrated Nano-photonic Resonators — •Xiaoyu Cheng1, Benyamin Shnirman1,4, Artur Skljarow1, Hadiseh Alaeian2, Wei Fu3, Sunny Yang3, Hong Tang3, Markus Greul4, Mathias Kaschel4, Tilman Pfau1, and Robert Loew1 — 15. Physikalisches Institut and Center for Integrated Quantum Science and Technology (IQST), Universität Stuttgart, Germany — 2School of Electrical and Computer Engineering, Purdue University, Indiana, USA — 3Department of Electrical Engineering, Yale University, Connecticut, USA — 4Institut für Mikroelektronik Stuttgart (IMS-Chips), Stuttgart, Germany
We study hybrid devices consisting of thermal atomic vapours and Nano-photonic waveguides for manipulating the interaction of atoms with single photons. This allows applications of collective and cooperative effects in the field of quantum technologies. One goal here is to reach the strong coupling regime for a single atom interacting with the mode of photonic crystal cavity (PhC). Our first resonator design is a suspended photonic crystal cavity, which allows us to tightly confine the mode into the interaction region. We have fabricated these devices with a novel high selectivity under-etching technique. A second line of research is to make use of the Rydberg blockade effects to generate single photons. We work with high Q (Q>400000) resonators coupled with bus waveguides. This allows high intensities to excite the weak dipole transitions to Rydberg states. In addition, we plan to taper the waveguides to enhance the range of the evanescent field such that we will be less vulnerable to transit time effects and surface interactions.