Details
| Original language | English |
|---|---|
| Article number | 123002 |
| Journal | Physical review letters |
| Volume | 87 |
| Issue number | 12 |
| Publication status | Published - 30 Aug 2001 |
Abstract
Ultracold atoms at temperatures close to the recoil limit have been achieved by extending Doppler cooling to forbidden transitions. A cloud of 40Ca atoms has been cooled and trapped to a temperature as low as 6μK by operating a magnetooptical trap on the spin-forbidden intercombination transition. Quenching the long-lived excited state with an additional laser enhanced the scattering rate by a factor of 15, while a high selectivity in velocity was preserved. With this method, more than 10% of precooled atoms from a standard magnetooptical trap have been transferred to the ultracold trap. Monte Carlo simulations of the cooling process are in good agreement with the experiments.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical review letters, Vol. 87, No. 12, 123002, 30.08.2001.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Doppler Cooling and Trapping on Forbidden Transitions
AU - Binnewies, T.
AU - Wilpers, G.
AU - Sterr, U.
AU - Riehle, F.
AU - Helmcke, J.
AU - Mehlstäubler, T. E.
AU - Rasel, E. M.
AU - Ertmer, W.
PY - 2001/8/30
Y1 - 2001/8/30
N2 - Ultracold atoms at temperatures close to the recoil limit have been achieved by extending Doppler cooling to forbidden transitions. A cloud of 40Ca atoms has been cooled and trapped to a temperature as low as 6μK by operating a magnetooptical trap on the spin-forbidden intercombination transition. Quenching the long-lived excited state with an additional laser enhanced the scattering rate by a factor of 15, while a high selectivity in velocity was preserved. With this method, more than 10% of precooled atoms from a standard magnetooptical trap have been transferred to the ultracold trap. Monte Carlo simulations of the cooling process are in good agreement with the experiments.
AB - Ultracold atoms at temperatures close to the recoil limit have been achieved by extending Doppler cooling to forbidden transitions. A cloud of 40Ca atoms has been cooled and trapped to a temperature as low as 6μK by operating a magnetooptical trap on the spin-forbidden intercombination transition. Quenching the long-lived excited state with an additional laser enhanced the scattering rate by a factor of 15, while a high selectivity in velocity was preserved. With this method, more than 10% of precooled atoms from a standard magnetooptical trap have been transferred to the ultracold trap. Monte Carlo simulations of the cooling process are in good agreement with the experiments.
UR - http://www.scopus.com/inward/record.url?scp=37649030548&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.87.123002
DO - 10.1103/PhysRevLett.87.123002
M3 - Article
AN - SCOPUS:37649030548
VL - 87
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 12
M1 - 123002
ER -