Recoil-Limited Laser Cooling ofSr87Atoms near the Fermi Temperature

Abstract

A dynamic magneto-optical trap, which relies on the rapid randomization of population in Zeeman substates, has been demonstrated for fermionic strontium atoms on the ${}^{1}S_0-{}^{3}P_1$ intercombination transition. The obtained sample, $1\times {10}^6$ atoms at a temperature of $2\mu \mathrm{K}$ in the trap, was further Doppler cooled and polarized in a far-off resonant optical lattice to achieve 2 times the Fermi temperature.