Direct frequency-comb spectroscopy of a dipole-forbidden clock transition in trapped 40Ca+ ions

We demonstrate direct frequency-comb (FC) spectroscopy of the dipole-forbidden 4s(2)S(1/2)-3d(2)D(5/2) transition in trapped (40)Ca(+) ions using an unamplified FC laser. The excitation is detected with nearly 100% efficiency using a shelving scheme in combination with single-ion imaging. The method...

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Bibliographic Details
Published in:Optics letters 2011, Vol.36 (1), p.49-51
Main Authors: WOLF, Anne Lisa, MORGENWEG, Jonas, KOELEMEIJ, Jeroen C. J, VAN DEN BERG, Steven A, UBACHS, Wim, EIKEMA, Kjeld S. E
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Optics
Physics
Online Access:Get full text
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Summary:We demonstrate direct frequency-comb (FC) spectroscopy of the dipole-forbidden 4s(2)S(1/2)-3d(2)D(5/2) transition in trapped (40)Ca(+) ions using an unamplified FC laser. The excitation is detected with nearly 100% efficiency using a shelving scheme in combination with single-ion imaging. The method demonstrated here has the potential to reach hertz-level accuracy, if a hertz-level linewidth FC is used in combination with confinement in the Lamb-Dicke regime.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.36.000049