Figure 1: Experimental realization of a directional atom-nanofibre interface.
From: Quantum state-controlled directional spontaneous emission of photons into a nanophotonic waveguide
(a) Schematic of the experiment: atoms (yellow spheres) are trapped on one side of the nanofibre (radius a) at the transverse position (y=0 and, here, a<x≈480 nm). A left-handed circularly polarized laser beam that propagates in the +y-direction (vertical green arrow) excites the atoms. The fluorescence light that the atoms emit into the nanofibre is recorded using two detectors, one at each end of the fibre. (b) Sketch of the setup including the tapered optical fibre (TOF), the dipole trap laser beam paths (red and blue lines), the resonant light beam paths (green dotted lines) and the atoms at the nanofibre section of the TOF. The orientation of the external homogeneous offset magnetic field Boff is indicated. 50:50 denotes a balanced polarization-independent beam splitter. The wavelengths of the light fields are indicated.
