Analyzing a single-laser repumping scheme for efficient loading of a strontium magneto-optical trap

Abstract

We demonstrate enhanced loading of strontium atoms into a magneto-optical trap using a repumping scheme from the metastable state via the doubly-excited state $5\mathrm{s}5\mathrm{p}{}^3{\mathrm{P}}_2\to 5{\mathrm{p}}^2{}^3{\mathrm{P}}_2$ at $481\mathrm{nm}$. The number of trapped atoms is increased by an order of magnitude. The frequency and intensity dependence of the atom number enhancement, with respect to the non-repumping case, is well reproduced by a simple rate equation model, which also describes single-laser repumping schemes reported previously. The repumping scheme is limited by a weak additional loss channel into the long-lived $5\mathrm{s}5\mathrm{p}{}^3{\mathrm{P}}_0$ state. For low repumping intensities, the signature of a halo formed by magnetically trapped atoms in the metastable state is found.

References in corpus (12)

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• An extended-cavity diode laser at 497 nm for laser cooling and trapping of neutral strontium
• Comparison between 403 nm and 497 nm repumping schemes for strontium magneto-optical traps

Cited by in corpus (10)

• A strontium quantum-gas microscope
• Atom-Number Enhancement by Shielding Atoms from Losses in Strontium Magneto-Optical Traps
• Rydberg blockade in an ultracold strontium gas revealed by two-photon excitation dynamics
• Novel repumping on ${}^3$P${}_0$$\to$${}^3$D${}_1$ for Sr magneto-optical trap and Landé g factor measurement of ${}^3$D${}_1$
• Charge dynamics of a molecular ion immersed in a Rydberg-dressed atomic lattice gas
• Optical pumping of ${5s4d}^1{\mathrm{D}}_2$ strontium atoms for laser cooling and imaging
• Limitation of single-repumping schemes for laser cooling of Sr atoms
• Analyzing the optical pumping on the $5s4d{}^1{D}_2-5s8p{}^1{P}_1$ transition in a magneto-optical trap of Sr atoms
• Absolute frequency measurements on the $5s5p^3$P${}_0\to 5s6d^3$D${}_1$ transition in strontium
• Single Sr Atoms in Optical Tweezer Arrays for Quantum Simulation