Formation of ultracold metastable RbCs molecules by short-range photoassociation

Abstract

Ultracold metastable RbCs molecules are observed in a double species MOT through photoassociation near the Rb(5S${}_{1/2}$)+Cs(6P${}_{3/2}$) dissociation limit followed by radiative stabilization. The molecules are formed in their lowest triplet electronic state and are detected by resonant enhanced two-photon ionization through the previously unobserved $(3{)}^3\Pi \leftarrow a^3{\Sigma }^{+}$ band. The large rotational structure of the observed photoassociation lines is assigned to the lowest vibrational levels of the $0^{+},0^{-}$ excited states correlated to the Rb(5P${}_{1/2}$)+Cs(6S${}_{1/2}$) dissociation limit. This demonstrates the possibility to induce direct photoassociation in heteronuclear alkali-metal molecules at short internuclear distance, as pointed out in [J. Deiglmayr \textit{et al.}, Phys. Rev. Lett. \textbf{101}, 13304 (2008)].

References in corpus (6)

• A High Phase-Space-Density Gas of Polar Molecules
• Quantum Gas of Deeply Bound Ground State Molecules
• Ultracold Molecules in the Ro-Vibrational Triplet Ground State
• Optical pumping and vibrational cooling of molecules
• Molecular Dipolar Crystals as High Fidelity Quantum Memory for Hybrid Quantum Computing
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• Photoassociation of Ultracold NaLi
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• Dynamical process of optically trapped singlet ground state ${}^{85}$Rb${}^{133}$Cs molecules produced via short-range photoassociation
• Short-range photoassociation from the inner wall of the lowest triplet potential of ${}^{85}$Rb${}_2$
• The $d{}^3\Pi$ state of LiRb