Prehn A, Ibrügger M, Glöckner R, Rempe G, Zeppenfeld M. Optoelectrical Cooling of Polar Molecules to Submillikelvin Temperatures.
PHYSICAL REVIEW LETTERS 2016;
116:063005. [PMID:
26918988 DOI:
10.1103/physrevlett.116.063005]
[Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Indexed: 06/05/2023]
Abstract
We demonstrate direct cooling of gaseous formaldehyde (H2CO) to the microkelvin regime. Our approach, optoelectrical Sisyphus cooling, provides a simple dissipative cooling method applicable to electrically trapped dipolar molecules. By reducing the temperature by 3 orders of magnitude and increasing the phase-space density by a factor of ∼10(4), we generate an ensemble of 3×10(5) molecules with a temperature of about 420 μK, populating a single rotational state with more than 80% purity.
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