Abstract
Harvesting infrared and visible light energy using optical rectennas—diode-coupled optical antennas—is strongly dependent on the diode current–voltage characteristics. Predicting the conversion efficiency is an arduous procedure that involves calculating the efficiency by solving the nonlinear diode circuit using the theory of photon-assisted tunneling (PAT). Because of the complexity of the calculations, many rectenna diodes have been reported without indications of how well these diodes will actually function in a rectenna. To provide a quick assessment of the diodes’ usefulness in optical rectennas, we provide a figure of merit ( FOM ) that incorporates the diodes’ current–voltage and capacitance, the antenna radiation resistance, and the illumination parameters.
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