Optikseminar

The integration of Nano-photonics and atomic physics has been a long-sought goal that would introduce new frontiers for optical physics, including novel quantum transport and many-body phenomena based on photon-mediated atomic interactions. Reaching this goal requires surmounting various challenges both in Nano-fabrication as well as atomic manipulation.   In this talk, I report our recent results on integrated thermal vapors with engineered light fields. Since the thermal motion of the atoms in a vapor limits their coherence features, a larger coupling rate is required to control the atoms efficiently. To achieve a larger Rabi frequency while still having reasonable laser power, we have used Nano-photonic devices with tightly-focused electromagnetic fields and small mode-volumes. In particular, I will talk about the interaction between atomic transitions in the thermal vapor of rubidium (Rb) and optical modes of Si3N4 waveguides, ring resonators, and Mach-Zehnder interferometers. Moreover, I will introduce the Monte-Carlo simulation method that has been developed in our group to effectively model the interaction of the moving atoms with the Nano-device electromagnetic field by properly incorporating the surface effects via Casimir-Polder potentials. Besides, I will present some of our most recent results on two-photon Rb-spectroscopy close to silicon surfaces and elaborate on its promises for compatibility with the well-established silicon fabrication technology. The talk will be concluded with some of our ongoing works and perspectives for employing this platform for exploring new directions in cavity QED and devising new schemes for investigating atom-atominteractions in low-dimensional light fields.

Organisator

  • Prof. Stefan Scheel

Veranstaltungsort

  • Hörsaal 2

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