Abstract
A significant problem in laser cooling of molecules is the presence of the dark Zeeman sublevels. Herein, a detailed theoretical and experimental study of destabilizing the dark states is reported in magnesium monofluoride molecules. By applying an external magnetic field, the Zeeman sublevels are made to be time dependent and nondegenerate, forcing the dark states to Larmor precess into the bright states. It is found that the laser induced fluorescence signal depends on the angle and the magnitude of the magnetic field. Theoretical calculations are performed by solving the density matrix equations for the multiple-level system, which shows good agreement with experimental data. This study may provide a useful perspective for continuous efforts toward laser cooling of MgF molecules.
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