Institut für Experimentalphysik und Zentrum für Quantenphysik, Universität Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria.
Phys Chem Chem Phys. 2011 Nov 14;13(42):18926-35. doi: 10.1039/c1cp21769k. Epub 2011 Aug 19.
We perform one- and two-photon high resolution spectroscopy on ultracold samples of RbCs Feshbach molecules with the aim to identify a suitable route for efficient ground-state transfer in the quantum-gas regime to produce quantum gases of dipolar RbCs ground-state molecules. One-photon loss spectroscopy allows us to probe deeply bound rovibrational levels of the mixed excited (A(1)Σ(+)-b(3)Π)0(+) molecular states. Two-photon dark state spectroscopy connects the initial Feshbach state to the rovibronic ground state. We determine the binding energy of the lowest rovibrational level |v'' = 0, J'' = 0> of the X(1)Σ(+) ground state to be D = 3811.5755(16) cm(-1), a 300-fold improvement in accuracy with respect to previous data. We are now in the position to perform stimulated two-photon Raman transfer to the rovibronic ground state.
我们对超冷的 RbCs 费什巴赫分子样品进行了单光子和双光子高分辨率光谱学研究，目的是确定一种在量子气体状态下实现高效基态转移的合适途径，以产生具有极性 RbCs 基态分子的量子气体。单光子损耗光谱学使我们能够探测到混合激发（A(1)Σ(+)-b(3)Π)0(+)分子态的深束缚振转能级。双光子暗态光谱学将初始费什巴赫态连接到振转基态。我们确定 X(1)Σ(+)基态的最低振转能级 |v'' = 0, J'' = 0>的结合能为 D = 3811.5755(16) cm(-1)，相对于先前的数据，精度提高了 300 倍。我们现在可以进行受激双光子拉曼转移到振转基态。
