Hannover 2020 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 14: Poster Session - Atomic Physics II
A 14.9: Poster
Dienstag, 10. März 2020, 16:00–18:00, Empore Lichthof
Two-photon spectroscopy of Rubidium atoms in the vicinity of Silicon Nano-photonic Waveguides — •Artur Skljarow1, Wolfram H.P. Pernice2, Harald Kübler1, Hadiseh Alaeian1, Robert Löw1, and Tilman Pfau1 — 15. Physikalisches Institut and Center for Integrated Quantum Science and Technology (IQST), Universität Stuttgart, Germany — 2Institute of Physics, University of Münster, Heisenbergstr. 11, D-48149 Münster, Germany
The marriage of photonic structures and thermal atomic vapors on a chip provides efficient atom-light coupling on a miniaturized scale well beyond the diffraction limit.
We study an integrated silicon photonic chip, composed of several sub-wavelength ridge waveguides, immersed in a micro-cell with rubidium vapor. Employing two-photon excitation, including a telecom wavelength, we observe that the waveguide transmission spectrum gets modified when the photonic mode is coupled to rubidium atoms through its evanescent tail. The measured spectra corroborate pretty well with a generalized effective susceptibility model that includes the Casimir-Polder potentials, due to the silicon surface, and the transient interaction between the evanescent field and the moving atoms. This work paves the way towards a miniaturized and integrated hybrid atomic-photonic system compatible with CMOS technologies.
[1] R. Ritter et al., Appl. Phys. Lett. 107, 041101 (2015)
[2] R. Ritter et al., New Journal of Physics 18, 103031 (2016)
[3] R. Ritter et at., Phys. Rev. X 8, 021032 (2018)