Fig. 2
Extinction of a weak coherent probe beam. a One-sided illumination. Transmission at detector D1 (blue diamonds) and D2 (red squares) when probing via path 1 or path 2, respectively. Solid lines are Lorentzian fits. The inset shows the normalized histogram of detected photons during the probe cycle (solid line) and reference cycle (grey) for the resonant data point. b Same as a but with 4Pi illumination. The total transmission (black circles) is obtained from the sum of detectors D1 and D2. Error bars represent ±1 s.d. of propagated Poissonian counting uncertainties. The far-off-resonant optical dipole trap (FORT) shifts the resonance frequency by ~38.5 MHz compared to the natural transition frequency
