Improved Radio-Frequency Magneto-Optical Trap of SrF Molecules
| Autor: | Matthew Steinecker, David DeMille, Yuqi Zhu, D. J. McCarron |
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| Rok vydání: | 2016 |
| Předmět: |
Condensed Matter::Quantum Gases
Number density Chemistry Monofluoride Chemical polarity Trapping Laser 01 natural sciences Atomic and Molecular Physics and Optics 010305 fluids & plasmas law.invention Optical pumping chemistry.chemical_compound law Magneto-optical trap 0103 physical sciences Physics::Atomic Physics Radio frequency Physical and Theoretical Chemistry Atomic physics 010306 general physics |
| Zdroj: | Chemphyschem : a European journal of chemical physics and physical chemistry. 17(22) |
| ISSN: | 1439-7641 |
| Popis: | We report the production of ultracold, trapped strontium monofluoride (SrF) molecules with number density and phase-space density significantly higher than previously achieved. These improvements are enabled by three distinct changes to our recently-demonstrated scheme for radio-frequency magneto-optical trapping of SrF: modification of the slowing laser beam geometry, addition of an optical pumping laser, and incorporation of a compression stage to the magneto-optical trap. With these improvements, we observe a trapped sample of SrF molecules at density 2.5×105 cm−3 and phase-space density 6×10−14, each a factor of 4 greater than in previous work. Under different experimental conditions, we observe trapping of up to 104 molecules, a factor of 5 greater than in previous work. Finally, by reducing the intensity of the applied trapping light, we observe molecular temperatures as low as 250 μK. |
| Databáze: | OpenAIRE |
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