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We report an optical dipole trap for calcium. The trap is created by focusinga 488 nm argon-ion laser beam into a calcium magneto-optical trap. Theargon-ion laser photo-ionizes atoms in the trap because of a near-resonancewith the 4s4f 1F3 level. By measuring the dipole trap decay rate as a functionof argon-ion laser intensity, we determine the 1F3 photo-ionization crosssection at our wavelength to be approximately 230 Mb.Comment: 5 pages, 4 figure

physical review. a, atomic, molecular, and optical physics/physical review, a, atomic, molecular, and optical physics

Two-photon photoionization of the Ca<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>4</mml:mn><mml:mi>s</mml:mi><mml:mn>3</mml:mn><mml:mi>d</mml:mi><mml:mspace width="0.2em" /><mml:mmultiscripts><mml:mi>D</mml:mi><mml:mn>2</mml:mn><mml:none /><mml:mprescripts /><mml:none /><mml:mn>1</mml:mn></mml:mmultiscripts></mml:mrow></mml:math>level in an optical dipole trap

Two-photon photoionization of the Ca4s3dD21level in an optical dipole trap