High-resolution spectroscopy has been carried out on the 199Hg 1S0-3P0 spin and dipole forbidden transition, where the atoms are confined in a vertical one-dimensional optical lattice trap using light at the magic wavelength. We describe various characteristics of the resulting line spectra and assess the strength of the Lamb-Dicke confinement. Through a series of absolute frequency measurements of the 199Hg clock transition with respect to the LNE-SYRTE primary frequency standard, recorded over a 3-month period, we demonstrate a statistical fractional uncertainty of 2.5×10-16. We include details relating to the generation of ultraviolet light at three wavelengths necessary for the experiment: 253.7 nm for cooling and detection, 265.6 nm for clock transition probing, and 362.570 nm for lattice trapping, along with further aspects related to the magic wavelength evaluation. © 2014 American Physical Society.
|Pages (from-to)||043432-1 - 043432-8|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - 2014|