Observation of 1S0-3P0 transition of bosonic strontium in the Lamb-Dicke regime

Abstract

We report experiments on the observation of the 1 S 0 -3 P 0 transition spectrum of 88 Sr in the Lamb-Dicke regime. After going through a two-stage magneto-optical trap (MOT), 88 Sr cold atoms with number of about 1 10 5 and a longitudinal temperature of 8.4 K are loaded into a one-dimensional (1D) optical lattice, which is realized with a semiconductor laser at 813.4 nm. Using the magnetic field-inducing 3 P 1 state mixing into 3 P 0 state, the spectroscopy of the 1 S 0 -3 P 0 transition with a linewidth of 180 Hz is detected.