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arXiv:0808.3434 · Physical Review A

Two-photon photoassociative spectroscopy of ultracold Sr88

Y. N. Martinez de Escobar, Pascal G. Mickelson, Philippe Pellegrini, Sarah Nagel, Andrew J. Traverso, Mi Yan, Robin Côté, T. C. Killian

Published Dec 10, 2008• 105 citations
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Abstract

We present results from two-photon photoassociative spectroscopy of the least-bound vibrational level of the $X\phantom{\rule{0.2em}{0ex}}^{1}\ensuremath{\Sigma}_{g}^{+}$ state of the $^{88}\mathrm{Sr}_{2}$ dimer. Measurement of the binding energy allows us to determine the $s$-wave scattering length ${a}_{88}=\ensuremath{-}1.4(6){a}_{0}$. For the intermediate state, we use a bound level on the metastable $^{1}S_{0}\text{\ensuremath{-}}^{3}P_{1}$ potential, which provides large Franck-Condon transition factors and narrow one-photon photoassociative lines that are advantageous for observing quantum-optical effects such as Autler-Townes resonance splittings.

DOI
10.1103/physreva.78.062708

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We present results from two-photon photoassociative spectroscopy of the least-bound vibrational level of the X1\ensuremathΣg+X\phantom{\rule{0.2em}{0ex}}^{1}\ensuremath{\Sigma}_{g}^{+}X1\ensuremathΣg+​ state of the 88Sr2^{88}\mathrm{Sr}_{2}88Sr2​ dimer. Measurement of the binding energy allows us to determine the sss-wave scattering length a88=\ensuremath−1.4(6)a0{a}_{88}=\ensuremath{-}1.4(6){a}_{0}a88​=\ensuremath−1.4(6)a0​. For the intermediate state, we use a bound level on the metastable 1S0\ensuremath-3P1^{1}S_{0}\text{\ensuremath{-}}^{3}P_{1}1S0​\ensuremath-3P1​ potential, which provides large Franck-Condon transition factors and narrow one-photon photoassociative lines that are advantageous for observing quantum-optical effects such as Autler-Townes resonance splittings.
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