Japanese Journal of Applied Physics

Laser Cooling of a Neon Atomic Beam in Metastable States

Fujio Shimizu, Kazuko Shimizu, Hiroshi Takuma

Published Nov 1, 1987• 19 citations

Abstract

A neon atomic beam in the 1s5 (J=2) metastable level is cooled by a counterpropagating laser beam using 1s5-2p9 transition. By transferring the 1s5 population to the 1s3 (J=0) metastable level using the optical pumping through 2p2, a cooled 1s3 beam is also generated.

DOI: 10.1143/jjap.26.l1847

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Japanese Journal of Applied Physics

Laser Cooling of a Neon Atomic Beam in Metastable States

Fujio Shimizu, Kazuko Shimizu, Hiroshi Takuma

Published Nov 1, 1987• 19 citations

Publisher

Abstract

DOI: 10.1143/jjap.26.l1847

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Journal of the Optical Society of America AJan 1, 19870 citations

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A neon atomic beam in the metastable state 1

{s}_{5}

has been decelerated and trapped by the spontaneous light force of a resonant laser in a quadrupole magnetic field. Trapping has been achieved on all isotopes

^{20}\mathrm{Ne}

^{21}\mathrm{Ne}

, and

^{22}\mathrm{Ne}

using a sample with natural abundance. For

^{20}\mathrm{Ne}

, approximately 4\ifmmode\times\else\texttimes\fi{}

{10}^{7}

atoms are trapped.

We report three-stage laser cooling of Sr atoms using the

5{s}^{2}\phantom{\rule{0.16em}{0ex}}^{1}S_{0}

ground state and the

5s5p\phantom{\rule{0.16em}{0ex}}^{3}P_{2}

metastable state.

^{87}\mathrm{Sr}

atoms are precooled in a magneto-optical trap simultaneously operated on the

5{s}^{2}\phantom{\rule{0.16em}{0ex}}^{1}S_{0}

5s5p\phantom{\rule{0.16em}{0ex}}^{1}P_{1}

transition at 461 nm and on the

5s5p\phantom{\rule{0.16em}{0ex}}^{3}P_{2}

5s5d\phantom{\rule{0.16em}{0ex}}^{3}D_{3}

transition at 496 nm. Atoms optically pumped to the

5s5p\phantom{\rule{0.16em}{0ex}}^{3}P_{2}(F=13/2)

state are magneto-optically trapped and cooled down to 2.5(2) $\ensuremath{\mu}\mathrm{K}$ on the

5s5p\phantom{\rule{0.16em}{0ex}}^{3}P_{2}

5s4d\phantom{\rule{0.16em}{0ex}}^{3}D_{3}

transition at $2.9\phantom{\rule{0.28em}{0ex}}\ensuremath{\mu}\mathrm{m}$. Using this transition, we investigate one dimensional polarization gradient cooling of

^{88}\mathrm{Sr}

atoms, which have simple energy levels without hyperfine structure, down to 0.22(18) $\ensuremath{\mu}\mathrm{K}$ or 17 times the recoil temperature. We discuss prospects for continuous generation of ultracold Sr atoms combined with a state transfer technique.