2000/07/01 by Robert J. Rafac, R. J. Rafac, B. C. Young +7 · 3 citations
Decision Sciences · Physics and Astronomy · #Advanced Frequency and Time Standards #Cold Atom Physics and Bose-Einstein Condensates #Scientific Measurement and Uncertainty Evaluation #physics.atom-ph
paper · pdf · doi:10.1103/physrevlett.85.2462
4 pages, 4 figures, submitted for publication
arxiv created 2000/07/01 · openalex publication_date 2000/09/18 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Using a laser that is frequency locked to a Fabry-P'erot 'etalon of high finesse and stability, we probe the 5d106s2S1/2(F\phantom\rule0ex0ex=\phantom\rule0ex0ex0)\ensuremath↔5d96s22D5/2(F\phantom\rule0ex0ex=\phantom\rule0ex0ex2) \ensuremathΔmF\phantom\rule0ex0ex=\phantom\rule0ex0ex0 electric-quadrupole transition of a single laser-cooled 199Hg+ ion stored in a cryogenic radio-frequency ion trap. We observe Fourier-transform limited linewidths as narrow as 6.7 Hz at 282 nm ( 1.06\ifmmode×\else\texttimes\fi1015\phantom\rule0ex0exHz), yielding a line Q\ensuremath≈1.6\ifmmode×\else\texttimes\fi1014. We perform a preliminary measurement of the 5d96s22D5/2 electric-quadrupole shift due to interaction with the static fields of the trap, and discuss the implications for future trapped-ion optical frequency standards.