Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 38: Poster IV
Q 38.13: Poster
Mittwoch, 13. März 2024, 17:00–19:00, KG I Foyer
Nonlinear light-matter interaction based on integrated waveguides immersed in hot atomic vapor — •Annika Belz1, Robin Klöpfer1, Benyamin Shnirman1,2, Xiaoyu Cheng1, Harald Kübler1, Charles Stuart Adams3, Hadiseh Alaeian4, Robert Löw1, and Tilman Pfau1 — 15. Physikalisches Institut and Center for Integrated Quantum Science and Technology (IQST), Universität Stuttgart, Germany — 2Institut für Mikroelektronik Stuttgart (IMS-Chips), Stuttgart, Germany — 3Department of Physics, Joint Quantum Centre (JQC) Durham-Newcastle, Durham, United Kingdom — 4Departments of Electrical & Computer Engineering and Physics & Astronomy, Purdue University, West Lafayette, USA
The combination of thermal atomic vapor with nano-photonic structures provides a unique platform for the manipulation of atom-photon and light induced atom-atom interactions and can exhibit large optical non-linearities, even at the single photon level.
We can further enhance these non-linearities by using slot waveguides in which we observe repulsive interactions of the atoms within the slot via an enlarged Purcell factor. Thereby we generate a medium that reaches already in this specific setting a nonlinearity on the few photon level. In order to verify the nature of the non-linearity in more detail we plan to incorporate an integrated Mach-Zehnder interferometer to access also the non-linear phase shift.
Furthermore, we present first measurements of the phase shift in a thermal atomic vapor using a fiber coupled Michelson interferometer.
Keywords: Hot vapor; Integrated photonics; Dipole-dipole interaction; Nonlinear effects; Waveguide