  A proof of principle of a novel concept for event recording in dual-phase
liquid xenon detectors -- the Floating Hole Multiplier (FHM) -- is presented.
It is shown that a standard Thick Gaseous Electron Multiplier (THGEM), freely
floating on the liquid xenon surface permits extraction of electrons from the
liquid to the gas. Secondary scintillation induced by the extracted electrons
in the THGEM holes as well as in the uniform field above it was observed. The
first results with the FHM indicate that the concept of floating electrodes may
offer new prospects for large-scale dual-phase detectors, for dark matter
searches in particular.
