We demonstrate an artificial electronic nanomaterial, constructed by arrang
ement of nanometer-sized symmetry-breaking elements into a two-dimensional
lattice. The material exhibits intrinsic nonlinear electronic functionality
, and therefore functions also as a two-dimensional ratchet. We show that i
ndividual devices can be made by simply cutting pieces from the material. W
e also demonstrate that these devices operate at temperatures up to room te
mperature and at frequencies at least up to 50 GHz. (C) 2001 American Insti
tute of Physics.