We demonstrate a simple method to increase the optical density (OD) of cold atom clouds produced by a magneto-optical trap (MOT). A pair of rectangular anti-Helmholtz coils is used in the MOT to generate the magnetic field that produces the cigar-shaped atom cloud. With 7.2x10(8) (87)Rb atoms in the cigar-type MOT, we achieve an OD of 32 as determined by the slow light measurement and this OD is large enough such that the atom cloud can almost contain the entire Gaussian light pulse. Compared to the conventional MOT under the same trapping conditions, the OD is increased by about 2.7 folds by this simple method. In another MOT setup of the cigar-shaped Cs atom cloud, we achieve an OD of 105 as determined by the absorption spectrum of the |6S(1/2),F = 4>-->/6P(3/2),F' = 5> transition.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/oe.16.003753 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A coarse-grained model of clay colloidal aggregation and consolidation with explicit representation of the electrical double layer.
J Colloid Interface Sci
December 2024
Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ 08544, USA; High Meadows Environmental Institute, Princeton University, Princeton, NJ 08544, USA. Electronic address:
Knowledge Gap: The aggregation of clay minerals in liquid water exemplifies colloidal self-assembly in nature. These negatively charged aluminosilicate platelets interact through multiple mechanisms with different sensitivities to particle shape, surface charge, aqueous chemistry, and interparticle distance and exhibit complex aggregation structures. Experiments have difficulty resolving the associated colloidal assemblages at the scale of individual particles.
View Article and Find Full Text PDFChemical Bonding and Dynamic Structural Fluxionality of a Boron-Based BAl Cluster.
Molecules
December 2024
Department of Chemical and Materials Engineering, Lyuliang University, Lishi 033001, China.
We studied the boron-based composite cluster BAl doped with Al atoms. The global minimum structure of the BAl cluster is a three-layer structure, consisting of three parts: an Al unit, a B ring and an isolated Al atom. Charge calculations analysis shows that the cluster can be expressed as [Al][B][Al], has 6π/6σ double aromaticity and follows the (4+2) Hückel rule.
View Article and Find Full Text PDFTheoretical Investigation of Single-Atom Catalysts for Hydrogen Evolution Reaction Based on Two-Dimensional Tetragonal MoC.
Materials (Basel)
December 2024
School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710129, China.
Developing highly efficient and cost-competitive electrocatalysts for the hydrogen evolution reaction (HER), which can be applied to hydrogen production by water splitting, is of great significance in the future of the zero-carbon economy. Here, by means of first-principles calculations, we have scrutinized the HER catalytic capacity of single-atom catalysts (SACs) by embedding transition-metal atoms in the C and Mo vacancies of a tetragonal MoC slab, where the transition-metal atoms refer to Ti, V, Cr, Mn, Fe, Co, Ni and Cu. All the MoC-based SACs exhibit excellent electrical conductivity, which is favorable to charge transfer during HER.
View Article and Find Full Text PDFPhotochemical pathways in astronomical ices: A computational study of singlet oxygen reactions with hydrocarbons.
J Chem Phys
January 2025
Fritz Haber Research Center for Molecular Dynamics, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel.
Complex organic molecules are widespread in different areas of the interstellar medium, including cold areas, such as molecular clouds, where chemical reactions occur in ice. Among the observed molecules are oxygen-bearing organic molecules, which are of high interest given their significant role in astrobiology. Despite the observed rich chemistry, the underlying molecular mechanisms responsible for molecular formation in such cold dilute areas are still not fully understood.
View Article and Find Full Text PDFHydronium Ions Are Less Excluded from Hydrophobic Polymer-Water Interfaces than Hydroxide Ions.
J Phys Chem B
January 2025
Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.
The cloud point temperatures of aqueous poly(-isopropylacrylamide) (PNIPAM) and poly(ethylene) oxide (PEO) solutions were measured from pH 1.0 to pH 13.0 at a constant ionic strength of 100 mM.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!