Bell, A.S., Gill, P., Klein, H., Levick, A., Tamm, C., and Schnier, D. (1991) Laser cooling of trapped ytterbium ions using a four-level optical-excitation scheme. Physical Review A: Atomic, Molecular and Optical Physics, 44 (1). R20-R23. ISSN 1050-2947 (doi:10.1103/PhysRevA.44.R20)
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Publisher's URL: http://dx.doi.org/10.1103/PhysRevA.44.R20
We demonstrate laser cooling of 172Yb+ ions in a rf quadrupole trap using an alternative optical-excitation scheme. The metastable 4f145d2D3/2 state of Yb+, to which ions decay if the resonance (cooling) transition is driven, is depleted by driving an optical transition at a wavelength of 935 nm, which is much more attractive than the 2.438 μm radiation used previously. This couples the metastable state to a fourth energy level from which the ions decay rapidly to the ground state. Fluorescence line shapes of the cooling transition indicate that small numbers of Yb+ ions were cooled in this way to kinetic temperatures below 1 K.
|Glasgow Author(s) Enlighten ID:||Bell, Dr Angus|
|Authors:||Bell, A.S., Gill, P., Klein, H., Levick, A., Tamm, C., and Schnier, D.|
|College/School:||College of Science and Engineering > School of Physics and Astronomy|
|Journal Name:||Physical Review A: Atomic, Molecular and Optical Physics|
|Publisher:||American Physical Society|