SAMOP 2023 – scientific programme

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A: Fachverband Atomphysik

A 11: Precision Spectroscopy of Atoms and Ions II (joint session A/Q)

A 11.3: Talk

Tuesday, March 7, 2023, 11:30–11:45, F303

Enhancing Atom-Photon Interaction with Novel Integrated Nano-photonic Resonators — •Benyamin Shnirman — 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology (IQST), Universität Stuttgart, Germany

The marriage of thermal atomic vapor with nanophotonics provides a unique testbed for the manipulation of atom-atom and atom-photon interactions. While benefitting from strong miniaturisation, integration and scalability, this platform struggles with short atom-light interaction due to the thermal motion.

In order to overcome this dephasing mechanism, we need atom-light interaction to reach the strong coupling regime. A suitable candidate is a photonic crystal cavity (PhC), which combines a tight mode confinement with a high quality factor. In order to create an interface for atom-light interaction, we have developed a novel fabrication technique to suspend PhC's. This allows us to investigate cavity QED effects that are sensitive to single photons and single atoms. We present first characterization data of the fabricated PhC's and compare it to the simulation results.

Our other lines of research on nanophotonics and thermal atoms include the use of the Rydberg blockade effect on chip to generate single photons. In order to couple to the Rydberg states efficiently, the light field is locally enhanced by ultralow-loss micro-ring resonators.We also study topological edge states in arrays of ring resonators and how thermal atoms can be used to study the effect of optical nonlinearity on the bulk and edge modes.