Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA.
Phys Rev Lett. 2012 Sep 14;109(11):115303. doi: 10.1103/PhysRevLett.109.115303. Epub 2012 Sep 13.
We have produced large samples of stable ultracold (88)Sr(2) molecules in the electronic ground state in an optical lattice. The fast, all-optical method of molecule creation involves a near-intercombination-line photoassociation pulse followed by spontaneous emission with a near-unity Franck-Condon factor. The detection uses excitation to a weakly bound electronically excited vibrational level corresponding to a very large dimer and yields a high-Q molecular vibronic resonance. This is the first of two steps needed to create deeply bound (88)Sr(2) for frequency metrology and ultracold chemistry.
我们已经在光学晶格中产生了大量处于电子基态的稳定超冷 (88)Sr(2) 分子。这种快速的全光学分子生成方法涉及近复合线光缔合脉冲，随后自发发射具有近单位 Franck-Condon 因子。检测使用激发到对应于非常大的二聚体的弱束缚电子激发振动能级，并产生高 Q 分子振子共振。这是为频率计量和超冷化学创建深度束缚 (88)Sr(2) 所需的两个步骤中的第一步。
