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Selective sorting of neutral atoms and molecules by the gradient dipole force in the near field of laser radiation

В. В. Климов, Vladilen S Letokhov

Optics CommunicationsAug 1, 19944 citations

Gradient optical force on atoms: beyond dipole approximation

В. В. Климов, Vladilen S Letokhov

Optics CommunicationsMay 1, 19964 citations

Observation of Focusing of Neutral Atoms by the Dipole Forces of Resonance-Radiation Pressure

John E. Bjorkholm, Richard R. Freeman, Arthur Ashkin +1 more

For sodium atoms in an atomic beam, we demonstrate focusing, defocusing, and steering caused by the transverse dipole forces exerted by the radial intensity gradient of a superimposed and co-propagating resonant cw light beam. Dipole radiation-pressure forces differ from the forces due to spontaneous emission and are needed to achieve optical traps for neutral atoms.

Physical Review LettersNov 13, 1978266 citations

Experimental methods of cold collisions

J. Weiner

Atom traps Light forces It is well known that a light beam carries momentum and that the scattering of light by an object produces a force. This property of light was first demonstrated by Frish [139] through the observation of a very small transverse deflection (3 × 10 –5 rad) in a sodium atomic beam exposed to light from a resonance lamp. With the invention of the laser, it became easier to observe effects of this kind because the strength of the force is greatly enhanced by the use of intense and highly directional light fields, as demonstrated by Ashkin [20, 21] with the manipulation of transparent dielectric spheres suspended in water. The results obtained by Frish and Ashkin raised the possibility of using light forces to control the motion of neutral atoms. Although the understanding of light forces acting on atoms was already established by the end of the 1970s, unambiguous demonstration of atom cooling and trapping was not accomplished before the mid 1980s. In this section we discuss some fundamental aspects of light forces and schemes employed to cool and trap neutral atoms. The light force exerted on an atom can be of two types: a dissipative, spontaneous force and a conservative, dipole force. The spontaneous force arises from the impulse experienced by an atom when it absorbs or emits a quantum of photon momentum.Atom traps Light forces It is well known that a light beam carries momentum and that the scattering of light by an object produces a force. This property of light was first demonstrated by Frish [139] through the observation of a very small transverse deflection (3 × 10 –5 rad) in a sodium atomic beam exposed to light from a resonance lamp. With the invention of the laser, it became easier to observe effects of this kind because the strength of the force is greatly enhanced by the use of intense and highly directional light fields, as demonstrated by Ashkin [20, 21] with the manipulation of transparent dielectric spheres suspended in water. The results obtained by Frish and Ashkin raised the possibility of using light forces to control the motion of neutral atoms. Although the understanding of light forces acting on atoms was already established by the end of the 1970s, unambiguous demonstration of atom cooling and trapping was not accomplished before the mid 1980s. In this section we discuss some fundamental aspects of light forces and schemes employed to cool and trap neutral atoms. The light force exerted on an atom can be of two types: a dissipative, spontaneous force and a conservative, dipole force. The spontaneous force arises from the impulse experienced by an atom when it absorbs or emits a quantum of photon momentum.

Cambridge University Press eBooksDec 4, 20030 citations

Optical Dipole Traps for Neutral Atoms

Rudolf Grimm, Matthias Weidemüller, Yuri B. Ovchinnikov

Advances in atomic, molecular, and optical physicsJan 1, 20001,549 citations

Entangling dipole-dipole interactions with neutral atoms in an optical lattice

Gavin K. Brennen

Dec 1, 20010 citations

Observation of dipole forces exerted on neutral atoms by intensity gradients of resonant light (A)

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