  A light-pressure electric generator (LPEG) is reported that converts
amplified radiation pressure into electrical energy. Its underlying principle
differs from that of conventional piezoelectric power generation. The generator
was fabricated by coating a thin Pb(Zr,Ti)O3 film on a wet-chemical-etched
microvoid-shaped structure on the surface of a GaAs wafer and then depositing
platinum. The surface plasmon phenomenon of the precious metal and the
microvoid structure caused the radiation pressure to be amplified sufficiently
to stimulate the piezoelectric material. This method provides versatile and
cost-effective energy harvesting and represents a potentially useful new way of
powering the Internet of Things devices.
