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  • International Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 1987),
  • paper THHH2

Observation of surface light-induced drift

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Abstract

We observed light-induced drift (LID) in a one-component gas, originating from different scattering of excited and ground-state molecules by the wall of the containing vessel. For a qualitative understanding, let the gas be confined in a tube which is illuminated by a laser beam along its axis (x axis). By tuning the laser within a Doppler-broadened absorption line, one can selectively excite molecules in a velocity group around vxL = λΔν, where λ is the wavelength and Δν is the detuning. If the accommodation coefficient for parallel momentum transfer to the wall is state- dependent, the momentum transfer from the excited molecules with vxvxL will not be balanced by that from their ground-state counterparts with vx ≈ − vxl. Consequently, the gas will be set into motion in the direction of the molecules having the smaller accommodation.

© 1987 Optical Society of America

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