دورية أكاديمية
Optical cycling of AlF molecules
| العنوان: | Optical cycling of AlF molecules |
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| المؤلفون: | S Hofsäss, M Doppelbauer, S C Wright, S Kray, B G Sartakov, J Pérez-Ríos, G Meijer, S Truppe |
| المصدر: | New Journal of Physics, Vol 23, Iss 7, p 075001 (2021) |
| بيانات النشر: | IOP Publishing, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Science LCC:Physics |
| مصطلحات موضوعية: | laser cooling, cold molecules, buffer gas cooling, Science, Physics, QC1-999 |
| الوصف: | Aluminium monofluoride (AlF) is a promising candidate for laser cooling and trapping at high densities. We show efficient production of AlF in a bright, pulsed cryogenic buffer gas beam, and demonstrate rapid optical cycling on the Q rotational lines of the A ^1 Π ↔ X ^1 Σ ^+ transition. We measure the brightness of the molecular beam to be >10 ^12 molecules per steradian per pulse in a single rotational state and present a new method to determine its velocity distribution in a single shot. The photon scattering rate of the optical cycling scheme is measured using three different methods, and is compared to theoretical predictions of the optical Bloch equations and a simplified rate equation model. Despite the large number of Zeeman sublevels (up to 216 for the Q(4) transition) involved, a high scattering rate of at least 17(2) × 10 ^6 s ^−1 can be sustained using a single, fixed-frequency laser without the need to modulate the polarisation. We deflect the molecu-lar beam using the radiation pressure force and measure an acceleration of 8.7(1.5) × 10 ^5 m s ^−2 . Losses from the optical cycle due to vibrational branching to X ^1 Σ ^+ , v ″ = 1 are addressed efficiently with a single repump laser. Further, we investigate two other loss channels, parity mixing by stray electric fields and photo-ionisation. The upper bounds for these effects are sufficiently low to allow loading into a magneto‐optical trap. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1367-2630 |
| Relation: | https://doaj.org/toc/1367-2630 |
| DOI: | 10.1088/1367-2630/ac06e5 |
| URL الوصول: | https://doaj.org/article/0977be5e9c814309b3b96ec99e603487 |
| رقم الأكسشن: | edsdoj.0977be5e9c814309b3b96ec99e603487 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 13672630 |
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| DOI: | 10.1088/1367-2630/ac06e5 |