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Laser cooling of trapped ytterbium ions using a four-level optical-excitation scheme

Bell, A.S., Gill, P., Klein, H., Levick, A., Tamm, Chr., 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

Abstract

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.

Item Type:Article
Status:Published
Refereed:Yes
Glasgow Author(s):Bell, Dr Angus
Authors: Bell, A.S., Gill, P., Klein, H., Levick, A., Tamm, Chr., 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
ISSN:1050-2947
ISSN (Online):1094-1622

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