Using a Laguerre-Gaussian beam to trap and cool the rotational motion of a mirror

Details Using a Laguerre-Gaussian beam to trap and cool the rotational motion of a mirror Using a Laguerre-Gaussian beam to trap and cool the rotational motion of a mirror

2007-05-06

arxiv.org/abs/0705.0784v2

Physics

Quantum Physics

New cavity design, reworked title; to appear in Phys. Rev. Lett

Scientific paper

We show theoretically that it is possible to trap and cool the rotational motion of a macroscopic mirror made of a perfectly reflecting spiral phase element using orbital angular momentum transfer from a Laguerre-Gaussian optical field. This technique offers a promising route to the placement of the rotor in its quantum mechanical ground state in the presence of thermal noise. It also opens up the possibility of simultaneously cooling a vibrational mode of the same mirror. Lastly, the proposed design may serve as a sensitive torsional balance in the quantum regime.

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