  Generating non-reciprocal radio frequency transduction plays important roles
in a wide range of research and applications, and an aspiration is to integrate
this functionality into micro-circuit without introducing magnetic field,
which, however, remains challenging. By designing a 1D artificial lattice
structure with neighbor-interaction engineered parametrically, we predicted a
non-reciprocity transduction with giant unidirectionality. We then
experimentally demonstrated the phenomenon on a nano-electromechanical chip
fabricated by conventional complementary metal-silicon processing. A
unidirectionality with isolation as high as 24dB is achieved and several
different transduction schemes are realized by programming the control voltages
topology. Apart from being used as a radio frequency isolator, the system
provides a way to build practical on-chip programmable device for many
researches and applications in radio frequency domain.
