Coherent excitation of the6S1/2to5D3/2electric-quadrupole transition in138Ba+

Adam Kleczewski, Matthew R. Hoffman, J. A. Sherman, Eric Magnuson, B. B. Blinov, E. N. Fortson
2012 Physical Review A. Atomic, Molecular, and Optical Physics  
The electric dipole-forbidden, quadrupole 6S1/2 <-> 5D3/2 transition in Ba+ near 2051 nm, with a natural linewidth of 13 mHz, is attractive for potential observation of parity non-conservation, and also as a clock transition for a barium ion optical frequency standard. This transition also offers a direct means of populating the metastable 5D3/2 state to measure the nuclear magnetic octupole moment in the odd barium isotopes. Light from a diode-pumped, solid state Tm,Ho:YLF laser operating at
more » ... aser operating at 2051 nm is used to coherently drive this transition between resolved Zeeman levels in a single trapped 138Ba+ ion. The frequency of the laser is stabilized to a high finesse Fabry Perot cavity at 1025 nm after being frequency doubled. Rabi oscillations on this transition indicate a laser-ion coherence time of 3 ms, most likely limited by ambient magnetic field fluctuations.
doi:10.1103/physreva.85.043418 fatcat:gtmmeenoyjfxtasla2nweuydou