Keywords

calcium, magneto-optical effects, radiation pressure, photoionisation, atom-photon collisions, two-photon processes

Abstract

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 1^F3 level. By measuring the dipole-trap decay rate as a function of argon-ion laser intensity, we determine the 1^F3 photoionization cross section at our wavelength to be approximately 230 Mb.

Original Publication Citation

J. E. Daily, R. Gommers, E. A. Cummings, D. S. Durfee, and S. D. Bergeson, “Two-photon photoionization of the Ca 4s3d 1D2 level in an optical dipole trap,” Physical Review A 71, 4346 (25). The original publication of this article can be found at http://link.aps.org/doi/1.113/PhysRevA.71.4346