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SUMMARY:Diffusion experiments of a metter wave on a finite size optical la
 ttice - Pierrick Cheiney (Toulouse)
DTSTART:20130121T153000Z
DTEND:20130121T170000Z
UID:TALK42520@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:Wave diffraction on periodic media is ubiquitous in optics. In
  particular\,\nfiber Bragg gratings\, i.e gratings imprinted directly in a
  fiber core are\nessential components widely used for example in telecommu
 nication devices\nand integrated fiber laser. In close analogy with these 
 optical devices\, we\nstudy the scattering of a guided matter wavepacket o
 n a finite size lattice.\nFurthermore\, in atom optics\, it is easily poss
 ible to vary in time the depth\nof the periodic potential which opens new 
 possibilities. By switching on\nadiabatically the optical lattice on a mov
 ing wavepacket\, we realize a\nBragg cavity for matter waves. Alternativel
 y\, the scattering on a modulated\nlattice enables one to engineer finely 
 the momentum distribution using only\nexternal degrees of freedom.\n\n
LOCATION:Rutherford building\, Seminar Room B
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