Precision lifetime measurements of a single trapped ion with ultrafast laser pulses

Moehring, D. L.; Blinov, B. B.; Gidley, D. W.; Kohn Jr., R. N.; Madsen, M. J.; Sanderson, T. D.; Vallery, R. S.; Monroe, C.

Precision lifetime measurements of a single trapped ion with ultrafast laser pulses

Authors

Description

We report precision measurements of the excited state lifetime of the $5p$ $^2P_{1/2}$ and $5p$ $^2P_{3/2}$ levels of a single trapped Cd$^+$ ion. The ion is excited with picosecond laser pulses from a mode-locked laser and the distribution of arrival times of spontaneously emitted photons is recorded. The resulting lifetimes are 3.148 $\pm$ 0.011 ns and 2.647 $\pm$ 0.010 ns for $^2P_{1/2}$ and $^2P_{3/2}$ respectively. With a total uncertainty of under 0.4%, these are among the most precise measurements of any atomic state lifetimes to date.
4 pages with 3 figures