Multi-grating design for integrated single-atom trapping, manipulation, and readout

TL;DR

This paper introduces an on-chip multi-grating device that efficiently traps, manipulates, and reads out single Rubidium atoms using integrated photonic circuits, enabling compact quantum applications.

Contribution

The paper presents a novel multi-grating design that integrates atom trapping, manipulation, and readout on a chip, advancing scalable quantum device development.

Findings

Successfully diffracts and overlaps laser beams to form single-atom traps.

Guides and collects fluorescence efficiently for atom state detection.

Provides a compact platform for quantum information and sensing applications.

Abstract

An on-chip multi-grating device is proposed to interface single-atoms and integrated photonic circuits, by guiding and focusing lasers to the area with ~10um 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 a lattice of single-atom dipole trap, with the diameter of optical dipole trap around 2.7um. Similar gratings are designed for guiding 780 nm probe laser to excite and also collect the fluorescence of 87Rb atoms. Such a device provides a compact solution for future applications of single atoms, including the single photon source, single-atom quantum register, and sensor.