Abstract
We experimentally demonstrate that the transmission line impedance of traveling-wave diodes can circumvent resistance-capacitance time-constant limitations of metal-insulator-metal diodes in rectennas operating at optical frequencies. We fabricated low resistance (380 Ω) and moderate responsivity (0.46 A/W) metal-insulator-metal traveling-wave diodes. When a rectenna incorporating the traveling-wave diode was illuminated with 10.6 μm radiation, it produced a peak system responsivity of 130 μA/W and a detectivity of 1.0 × 104 Jones. These results agree with the simulated device performance and exceed the response of an equivalent lumped-element metal-insulator-metal rectenna.
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