Multiphoton magnetooptical trap

Multiphoton magnetooptical trap

We demonstrate a magnetooptical trap (MOT) configuration which employs optical forces due to light scattering between electronically excited states of the atom. With the standard MOT laser beams propagating along the x and y directions, the laser beams along the z direction are at a different wavele...

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Bibliographic Details
Published in:Physical review letters Vol. 103; no. 17; p. 173003
Main Authors: Wu, Saijun, Plisson, Thomas, Brown, Roger C, Phillips, William D, Porto, J V
Format: Journal Article
Language:English
Published: United States 23-10-2009
Subjects:
ALKALI METALS
ATOMIC AND MOLECULAR PHYSICS
BOSONS
CESIUM
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COOLING
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
EXCITED STATES
LASERS
LIGHT SCATTERING
MAGNETO-OPTICAL EFFECTS
MASSLESS PARTICLES
METALS
MULTI-PHOTON PROCESSES
PHOTONS
RESONANCE
SCATTERING
TRAPPING
WAVELENGTHS
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Description
Summary:We demonstrate a magnetooptical trap (MOT) configuration which employs optical forces due to light scattering between electronically excited states of the atom. With the standard MOT laser beams propagating along the x and y directions, the laser beams along the z direction are at a different wavelength that couples two sets of excited states. We demonstrate efficient cooling and trapping of cesium atoms in a vapor cell and sub-Doppler cooling on both the red and blue sides of the two-photon resonance. The technique demonstrated in this work may have applications in background-free detection of trapped atoms, and in assisting laser cooling and trapping of certain atomic species that require cooling lasers at inconvenient wavelengths.
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ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.103.173003