Radiative deflection of a BaF molecular beam from the optical cycling

Abstract

We demonstrate a quasi optical cycling for the $X(v=0)\to A(v^{\prime }=0)$ transition and a radiative force induced deflection on the buffer-gas cooled BaF molecular beam. The laser induced fluorescence enhancement with additional sidebands and a polarization modulation scheme indicates that the hyperfine states and the Zeeman sublevels are closed. The quasi optical cycling by repumping the $X(v=1)\to A(v^{\prime }=0)$ leads to a $\sim$ 0.8 mm deflection of the beam via scattering $\sim$ 150 photons per molecule, in good agreement with the predictions from our multi-level rate equation model. Further improvement by closing the leakage $X(v=2)$ and $\Delta$ state allows scattering thousands of photons, and laser cooling and slowing of BaF.

7 pages, 6 figures

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Cited by in corpus (14)

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• Three-dimensional Magneto-optical Trapping of Barium Monofluoride
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• Spectroscopy on the $A^1\Pi \leftarrow X^1{\Sigma }^{+}$ Transition of Buffer-Gas Cooled AlCl
• Absorption spectroscopy for laser cooling and high-fidelity detection of barium monofluoride molecules
• Saturated absorption spectroscopy of buffer-gas-cooled Barium monofluoride molecules
• Laser cooling of barium monofluoride molecules using synthesized optical spectra
• Multivalent optical cycling centers in polyatomic molecules
• Hyperfine structure of the ${\mathbf{A}}^1\mathbf{\Pi }$ state of AlCl and its relevance to laser cooling and trapping
• Magnetic hyperfine structure constants of ${}^{137}$BaF in the ${}^2{\Pi }_{1/2}$ and ${}^2{\Pi }_{3/2}$ excited states
• High-resolution spectroscopy of barium monofluoride: Odd isotopologues, hyperfine structure and isotope shifts
• Optimizing Pulsed-Laser Ablation Production of AlCl Molecules for Laser Cooling
• Optical pumping and laser slowing of a heavy molecule