Fig. 1: Transition scheme and experimental setup. | Communications Physics

Fig. 1: Transition scheme and experimental setup.

From: A weakly-interacting many-body system of Rydberg polaritons based on electromagnetically induced transparency

Fig. 1

a Relevant energy levels and laser excitations in the experiment. States \(\left|1\right\rangle\), \(\left|2\right\rangle\), and \(\left|3\right\rangle\) correspond to the ground state \(\left|5{S}_{1/2},F=2,{m}_{F}=2\right\rangle\), Rydberg state \(\left|32{D}_{5/2},{m}_{J}=5/2\right\rangle\), and excited state \(\left|5{P}_{3/2},F=3,{m}_{F}=3\right\rangle\) of 87Rb atoms. Ωc and Ωp denote the coupling and probe Rabi frequencies, and Δc and Δp represent their detunings. b Experimental setup. AOM acousto-optic modulator, BSa, BSb: beam splitters, CLa, CLb, CLc: collimation lenses, PMF polarization-maintained optical fiber, BB beam block, Ma: mirror, Mb: movable mirror on a flip mount, PD photodetector (Thorlabs APD110A), PBS polarizing beam splitter, DM dichroic mirror, L1, L2, L3: lenses, QWP quarter-wave plate, EMCCD electron-multiplying charge-coupled device camera (Andor DL-604M-OEM), MMF multimode optical fiber, PMT photomultiplier tube and amplifier (Hamamatsu H6780-20 and C9663). Blue, red, and brown arrowed lines indicate the optical paths of the coupling, probe, and AOM’s zeroth-order beams, respectively.

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