Two-photon cooling of magnesium atoms
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Two-photon cooling of magnesium atoms. / Malossi, N.; Damkjær, S.; Hansen, P. L.; Jacobsen, L. B.; Kindt, L.; Sauge, S.; Thomsen, Jan Westenkær; Cruz, F. C.; Allegrini, M.; Arimondo, E.
In: Physical Review A (Atomic, Molecular and Optical Physics), Vol. 72, 2005, p. 051403(R).Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Two-photon cooling of magnesium atoms
AU - Malossi, N.
AU - Damkjær, S.
AU - Hansen, P. L.
AU - Jacobsen, L. B.
AU - Kindt, L.
AU - Sauge, S.
AU - Thomsen, Jan Westenkær
AU - Cruz, F. C.
AU - Allegrini, M.
AU - Arimondo, E.
N1 - Keywords: Optical cooling of atoms; trapping; Mechanical effects of light on atoms; molecules; electrons; and ions; Other multiphoton processes
PY - 2005
Y1 - 2005
N2 - A two-photon mechanism for cooling atoms below the Doppler temperature is analyzed. We consider the magnesium ladder system (3s2)S01¿(3s3p)P11 at 285.2nm followed by the (3s3p)P11¿(3s3d)D21 transition at 880.7nm . For the ladder system quantum coherence effects may become important. Combined with the basic two-level Doppler cooling process this allows for reduction of the atomic sample temperature by more than a factor of 10 over a broad frequency range. First experimental evidence for the two-photon cooling process is presented and compared to model calculations. Agreement between theory and experiment is excellent. In addition, by properly choosing the Rabi frequencies of the two optical transitions a velocity independent atomic dark state is observed.
AB - A two-photon mechanism for cooling atoms below the Doppler temperature is analyzed. We consider the magnesium ladder system (3s2)S01¿(3s3p)P11 at 285.2nm followed by the (3s3p)P11¿(3s3d)D21 transition at 880.7nm . For the ladder system quantum coherence effects may become important. Combined with the basic two-level Doppler cooling process this allows for reduction of the atomic sample temperature by more than a factor of 10 over a broad frequency range. First experimental evidence for the two-photon cooling process is presented and compared to model calculations. Agreement between theory and experiment is excellent. In addition, by properly choosing the Rabi frequencies of the two optical transitions a velocity independent atomic dark state is observed.
U2 - 10.1103/PhysRevA.72.051403
DO - 10.1103/PhysRevA.72.051403
M3 - Journal article
VL - 72
SP - 051403(R)
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
ER -
ID: 17270521