We report coherent association of atoms into a single weakly bound NaCs molecule in an optical tweezer through an optical Raman transition. The Raman technique uses a deeply bound electronic excited intermediate state to achieve a large transition dipole moment while reducing photon scattering. Starting from two atoms in their relative motional ground state, we achieve an optical transfer efficiency of 69%. The molecules have a binding energy of 770.2 MHz at 8.83(2) G. This technique does not rely on Feshbach resonances or narrow excited-state lines and may allow a wide range of molecular species to be assembled atom by atom.

中文翻译：

---

单分子的相干光学创建

我们报告了通过光学拉曼跃迁在光镊中原子相干结合成单个弱结合的 NaCs 分子。拉曼技术使用深度束缚的电子激发中间态来实现大跃迁偶极矩，同时减少光子散射。从处于相对运动基态的两个原子开始，我们实现了 69% 的光学传输效率。这些分子在 8.83(2) G 处具有 770.2 MHz 的结合能。该技术不依赖于 Feshbach 共振或窄激发态线，并且可以允许各种分子物种逐个原子地组装。