Scientific Results

Lambda-enhanced grey molasses on the D2 transition of Rubidium-87 atoms

Year: 2018

Authors: Rosi S., Burchianti A., Conclave S., Naik D.S., Roati G., Fort C., Minardi F.

Autors Affiliation: LENS European Laboratory for Non-Linear Spectroscopy, Dipartimento di Fisica e Astronomia, Università di Firenze, Sesto Fiorentino, 50019, Italy; Istituto Nazionale di Ottica, INO-CNR, Sesto Fiorentino, 50019, Italy; LP2N, Laboratoire Photonique, Numérique et Nanosciences, Université Bordeaux-IOGS-CNRS, Talence, F-33400, France

Abstract: Laser cooling based on dark states, i.e. states decoupled from light, has proven to be effective to increase the phase-space density of cold trapped atoms. Dark-states cooling requires open atomic transitions, in contrast to the ordinary laser cooling used for example in magneto-optical traps (MOTs), which operate on closed atomic transitions. For alkali atoms, dark-states cooling is therefore commonly operated on the D-1 transition nS(1/2) -> nP(1/2). We show that, for Rb-87, thanks to the large hyperfine structure separations the use of this transition is not strictly necessary and that \”quasi-dark state\” cooling is efficient also on the D-2 line, 5S(1/2) -> 5P(3/2). We report temperatures as low as (4.0 +/- 0.3) mu K and an increase of almost an order of magnitude in the phase space density with respect to ordinary laser sub-Doppler cooling.

Journal/Review: SCIENTIFIC REPORTS

Volume: 8      Pages from: 1301-1  to: 1301-9

More Information: This work was supported by MIUR (PRIN 2010LLKJBX) and by FP7 Cooperation STREP Project EQuaM (Grant no. 323714). We thank G. Colzi for useful discussions, C. D
DOI: 10.1038/s41598-018-19814-z

Citations: 22
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-24
References taken from IsiWeb of Knowledge: (subscribers only)
Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here

gdpr-image
This site uses cookies. If you decide to continue browsing we consider that you accept their use. For more information about cookies and how to delete them please read our Info Policy on cookies use.
Read more