A conveyor-belt blue-detuned MOT compresses trapped BaF molecules to 320 um, 240 uK, and a peak density of 1.3e7 cm^-3, a 50x density improvement over the red MOT.
Magneto-optical trapping of a heavy polyatomic molecule for precision measurement
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abstract
We report a magneto-optical trap of strontium monohydroxide (SrOH) containing 2000(600) molecules at a temperature of 1.2(3) mK. The lifetime is 91(9) ms, which is limited by decay to optically unaddressed vibrational states. This provides the foundation for future sub-Doppler cooling and optical trapping of SrOH, a polyatomic molecule suited for precision searches for physics beyond the Standard Model including new CP violating particles and ultralight dark matter. We also identify important features in this system that guide cooling and trapping of complex and heavy polyatomic molecules into the ultracold regime.
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Blue-detuned Magneto-optical Trap of BaF molecules
A conveyor-belt blue-detuned MOT compresses trapped BaF molecules to 320 um, 240 uK, and a peak density of 1.3e7 cm^-3, a 50x density improvement over the red MOT.