We use the angular Doppler-effect to obtain stable frequency shifts from below
one Hertz to hundreds of Hertz in the optical domain, constituting a control of
1 part in 1014. For the first time, we use these very small
frequency shifts to create continuous motion in interference patterns including
the scanning of linear fringe patterns and the rotation of the interference
pattern formed from a Laguerre-Gaussian beam. This enables controlled lateral
and rotational movement of trapped particles.
© 2002 Optical Society of America
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