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Laser-cleaning of the electrodes in a planar micro-fabricated ion trap hasbeen attempted using ns pulses from a tripled Nd:YAG laser at 355nm. The effectof the laser pulses at several energy density levels has been tested bymeasuring the heating rate of a single 40Ca+ trapped ion as a function of itssecular frequency. A reduction of the electric-field noise spectral density by~50% has been observed and a change in the frequency dependence also noticed.This is the first reported experiment where the "anomalous heating" phenomenonhas been reduced by removing the source as opposed to reducing its thermaldriving by cryogenic cooling. This technique may open the way to better controlof the electrode surface quality in ion microtraps.

Reduction of heating rate in a microfabricated ion trap by pulsed-laser cleaning