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Phys. Rev. A 71, 043406 (2005) [5 pages]

Two-photon photoionization of the Ca 4s3d  1D2 level in an optical dipole trap

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J. E. Daily, R. Gommers *, E. A. Cummings, D. S. Durfee, and S. D. Bergeson †
Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602, USA

Received 30 October 2004; published 19 April 2005

We report an optical dipole trap for calcium. The trap is created by focusing a 488-nm argon-ion laser beam into a calcium magneto-optical trap. The argon-ion laser photoionizes atoms in the trap because of a near-resonance with the 4s4f  1F3 level. By measuring the dipole-trap decay rate as a function of argon-ion laser intensity, we determine the 1F3 photoionization cross section at our wavelength to be approximately 230  Mb .


©2005 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.71.043406
DOI: 10.1103/PhysRevA.71.043406
PACS: 32.80.Pj, 32.80.Rm, 33.80.Eh

* Also at Physics Department, University College London, Gower Street, London, WC1E 6BT, U.K.
† Electronic address: scott.bergeson@byu.edu

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