Skip to main content

Research Repository

Advanced Search

Preparation of one 87Rb and one 133Cs atom in a single optical tweezer

Brooks, R.V.; Spence, S.; Guttridge, A.; Alampounti, A.; Rakonjac, A.; McArd, L.A.; Hutson, J.M.; Cornish, S.L.

Preparation of one 87Rb and one 133Cs atom in a single optical tweezer Thumbnail


Authors

R.V. Brooks

S. Spence

A. Guttridge

A. Alampounti

A. Rakonjac

L.A. McArd



Abstract

We report the preparation of exactly one 87Rb atom and one133Cs atom in the same optical tweezer as the essential first step towards the construction of a tweezer array of individually trapped 87Rb133Cs molecules. Through careful selection of the tweezer wavelengths, we show how to engineer species-selective trapping potentials suitable for high-fidelity preparation of Rb + Cs atom pairs. Using a wavelength of 814 nm to trap Rb and 938 nm to trap Cs, we achieve loading probabilities of 0.508(6) for Rb and 0.547(6) for Cs using standard red-detuned molasses cooling. Loading the traps sequentially yields exactly one Rb and one Cs atom in 28.4(6) % of experimental runs. Using a combination of an acousto-optic deflector and a piezo-controlled mirror to control the relative position of the tweezers, we merge the two tweezers, retaining the atom pair with a probability of 0.99(+0.01)(−0.02).We use this capability to study hyperfine-state-dependent collisions of Rb and Cs in the combined tweezer and compare the measured two-body loss rates with coupled-channel quantum scattering calculations.

Citation

Brooks, R., Spence, S., Guttridge, A., Alampounti, A., Rakonjac, A., McArd, L., …Cornish, S. (2021). Preparation of one 87Rb and one 133Cs atom in a single optical tweezer. New Journal of Physics, 23, Article 065002. https://doi.org/10.1088/1367-2630/ac0000

Journal Article Type Article
Acceptance Date May 10, 2021
Publication Date 2021-06
Deposit Date Apr 9, 2021
Publicly Available Date Mar 29, 2024
Journal New Journal of Physics
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 23
Article Number 065002
DOI https://doi.org/10.1088/1367-2630/ac0000

Files

Accepted Journal Article (1.7 Mb)
PDF

Publisher Licence URL
http://creativecommons.org/licenses/by/3.0/

Copyright Statement
Original content from
this work may be used
under the terms of the
Creative Commons
Attribution 4.0 licence.
Any further distribution
of this work must
maintain attribution to
the author(s) and the
title of the work, journal
citation and DOI.






You might also like



Downloadable Citations