  We investigate the operation of dual-gate reconfigurable field-effect
transistor (RFET) in the programgate at drain (PGAD) and program-gate at source
(PGAS) configurations. To this end, dual-gate silicon nanowire (SiNW) FETs are
fabricated based on anisotropic wet chemical silicon etching and nickel
silicidation yielding silicide-SiNW Schottky junctions at source and drain.
Whereas in PGAD-configuration ambipolar operation is suppressed, switching is
deteriorated due to the injection through a Schottky-barrier. Operating the
RFET in PGAS configuration yields a switching behavior close to a conventional
MOSFET. This, howewer, needs to be traded off against strongly non-linear
output characteristics for small bias.
