Multigrating design for integrated single-atom trapping, manipulation, and readout

An on-chip multigrating device is proposed to interface single atoms and integrated photonic circuits, by guiding and focusing lasers to the area similar to 10 mu m above the chip for trapping, state manipulation, and readout of single rubidium atoms. For the optical dipole trap, two 850-nm laser beams are diffracted and overlapped to form the lattice of a single-atom dipole trap, with the diameter of the optical dipole trap being around 2.7 mu m. Similar gratings are designed for guiding a 780-nm probe laser to excite and also collect the fluorescence of Rb-87 atoms. Such a device provides a compact solution for future applications of single atoms, including the single-photon source, single-atom quantum register, and single-atom quantum sensor.

Automated summary

An on-chip multigrating device is proposed for interfacing single atoms and integrated photonic circuits. It provides a compact solution for trapping, state manipulation, and readout of single rubidium atoms, and has potential applications in single-photon sources, single-atom quantum registers, and single-atom quantum sensors.