SAMOP 2021 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 2: Precision spectroscopy of atoms and ions (joint session A/Q)
A 2.19: Poster
Montag, 20. September 2021, 16:30–18:30, P
Engineering Atom-Photon and Atom-Atom Interactions with Nano-photonics — •Artur Skljarow1, Benyamin Shnirman1, Harald Kübler1, Hadiseh Alaeian2, Robert Löw1, and Tilman Pfau1 — 15. Physikalisches Institut and Center for Integrated Quantum Science and Technology (IQST), Universität Stuttgart, Germany — 2Departments of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana, USA
We study an integrated silicon photonic chip, composed of several sub-wavelength ridge and slot waveguides, immersed in a micro-cell with rubidium vapor. With the help of a two-photon excitation, we observe that the guided mode transmission spectrum gets modified when the photonic mode is coupled to rubidium atoms through its evanescent tail. We also investigate the coupling of atomic vapor to slot waveguides. The slot mode constrains the probed atomic density to an effective one-dimensional system. This is interesting to study the collective atom-atom interactions in 1D. We developed a Monte-Carlo simulation method to predict and interpret the measured data. In addition to the silicon plattform we are also fabricating and investigating Nano-devices made of silicon nitride. In order to reach the interesting quantum regime with thermal vapors we plan to create a non-linearity by enhancing the light field with a photonic crystal cavity. We have fabricated these devices with a novel underetching technique where specified regions with the Si3N4 PhCs are suspended in air. This technique allows direct coupling into the cavity via the waveguide and enables a more versatile design of the chip.