We demonstrate subrecoil cooling of rubidium atoms by velocity-selective coherent population trapping. By adiabatic transfer of the cooled atoms into a spin polarized single momentum state we show the coherence of the trapped state. Our cooling scheme takes advantage of the rubidium hyperfine structure to integrate subrecoil and sub-Doppler cooling. Starting from an initial velocity distribution of twice the recoil temperature $[{T}_{\mathrm{rec}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}(\ensuremath{\Elzxh}k{)}^{2}{/k}_{B}M]$, we cool down to 100 nK $(\ensuremath{\approx}\frac{1}{3}{T}_{\mathrm{rec}})$ within 1 ms, while almost completely suppressing the diffusive heating of velocity-selective coherent population trapping.We demonstrate subrecoil cooling of rubidium atoms by velocity-selective coherent population trapping. By adiabatic transfer of the cooled atoms into a spin polarized single momentum state we show the coherence of the trapped state. Our cooling scheme takes advantage of the rubidium hyperfine structure to integrate subrecoil and sub-Doppler cooling. Starting from an initial velocity distribution of twice the recoil temperature $[{T}_{\mathrm{rec}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}(\ensuremath{\Elzxh}k{)}^{2}{/k}_{B}M]$, we cool down to 100 nK $(\ensuremath{\approx}\frac{1}{3}{T}_{\mathrm{rec}})$ within 1 ms, while almost completely suppressing the diffusive heating of velocity-selective coherent population trapping.

Physical Review LettersApr 1, 199656 citations

Dynamics of laser cooling of atoms below the recoil temperature

I. E. Mazets, Boris G. Matisov

Nov 1, 19940 citations

Two-dimensional sub-recoil laser cooling

F. Bardou, John Lawall, Bruno Saubaméa +4 more

European Quantum Electronics Conference (EQEC)Jan 1, 19940 citations

Subrecoil Raman laser cooling of $lt;sup$ gt;6 $lt;/sup$ gt;Li atomsSubrecoil Raman laser cooling of $lt;sup$gt;6$lt;/sup$gt;Li atoms

Liang Zhang, Shichuan Yu, Pengyue Liu +3 more

We realize an efficient one-dimensional Raman cooling of 6Li atoms using 2S→2P Raman transition pulses and 2S→3P ultraviolet (UV) optical repumping. In this cooling scheme, we directly cool an initial cold atomic sample of 350 μK released from a standard magneto-optical trap down to a velocity spread of 0.8 recoil velocity, corresponding to an effective temperature of 4.5 μK, an increase of almost an order of magnitude in the phase space density with respect to ordinary laser sub-Doppler cooling. This technique may provide an ideal initial sub-recoil atomic sample for the application of the large-momentum-transfer in the recoil-sensitive lithium atom interferometers.We realize an efficient one-dimensional Raman cooling of 6Li atoms using 2S→2P Raman transition pulses and 2S→3P ultraviolet (UV) optical repumping. In this cooling scheme, we directly cool an initial cold atomic sample of 350 μK released from a standard magneto-optical trap down to a velocity spread of 0.8 recoil velocity, corresponding to an effective temperature of 4.5 μK, an increase of almost an order of magnitude in the phase space density with respect to ordinary laser sub-Doppler cooling. This technique may provide an ideal initial sub-recoil atomic sample for the application of the large-momentum-transfer in the recoil-sensitive lithium atom interferometers.

Frontiers of PhysicsJan 1, 20251 citation

Subrecoil laser cooling: recent developments in velocity-selective coherent population trapping

F. Bardou, Olivier Émile, Bruno Saubaméa +4 more

Velocity-selective coherent population trapping (VSCPT) is the first demonstrated sub-recoil laser cooling scheme.1

Annual Meeting Optical Society of AmericaJan 1, 19930 citations

The influence of momentum diffusion on laser cooling of atoms

Eugeny Korsunsky, A. Snegiriov, Vyacheslav M Gordienko +2 more

Zeitschrift für Physik D Atoms Molecules and ClustersMar 1, 19944 citations

Subrecoil Raman laser cooling of

lt;sup

gt;6

lt;/sup

gt;Li atoms