Photoassociation spectroscopy of weakly bound ${}^{87}R{b}_2$ molecules near $5P_{1/2}+5S_{1/2}$ threshold by optical Bragg scattering in Bose-Einstein condensates

Abstract

We report the high resolution photoassociation (PA) spectroscopy of a ${}^{87}Rb$ Bose-Einstein condensate (BEC) to excited molecular states near the dissociation limit of $5P_{1/2}+5S_{1/2}$ by optical Bragg scattering. Since the detection of optical Bragg scattering in BEC has a high signal-noise ratio, we obtain the high resolution PA spectrum of excited molecular states in the range of $\pm 1$ GHz near the dissociation limit of $5P_{1/2}+5S_{1/2}$. We compare the results with the conventional method of trap loss and show that the results agree each other very well. Many interesting phenomena of excited molecular states are observed, such as light-induced frequency shift and the anomalous strong bound molecular lines at the atomic transition from $|F=1⟩$ to $|F^{\prime }=2⟩$. The observed excited molecular states in the range of $\pm 1$ GHz near the dissociation limit of $5P_{1/2}+5S_{1/2}$ are never reported before, which will help to further improve the long range bound state models near the dissociation limit.

arXiv comment7 pages, 5 figures

References in corpus (16)

• Ultracold Dipolar Gas of Fermionic ${}^{23}$Na${}^{40}$K Molecules in their Absolute Ground State
• Influence of nearly resonant light on the scattering length in low-temperature atomic gases
• Observation of antiferromagnetic correlations in the Hubbard model with ultracold atoms
• Quantum Gas of Deeply Bound Ground State Molecules
• Nanometer-scale spatial modulation of an inter-atomic interaction in a Bose-Einstein condensate
• Controlling a magnetic Feshbach resonance with laser light
• Systematic study of Optical Feshbach Resonances in an ideal gas
• Controlling Condensate Collapse and Expansion with an Optical Feshbach Resonance
• Photonic Band Gaps in One-Dimensionally Ordered Cold Atomic Vapors
• Photoassociation of a Bose-Einstein Condensate near a Feshbach Resonance
• Superradiance Lattice
• Experimental observation of one-dimensional superradiance lattices in ultracold atoms
• Observation of Atom Number Fluctuations in a Bose-Einstein Condensate
• Photoassociation spectroscopy of a Spin-1 Bose-Einstein condensate
• Optical control of a magnetic Feshbach resonance in ultracold Fermi gases
• Universal Feature in Optical Control of a p-wave Feshbach Resonance