The increasing energy demands of the world's population and the quickly diminishing fossil fuel reserves together suggest the urgent need to secure long-lasting alternative and renewable energy resources. Here, we present a THz antenna integrated with a rectifier (rectenna) for harvesting infrared energy. We demonstrate a resonant bowtie antenna that has been optimized to produce highly enhanced localized fields at the bow tip. To benefit from this enhancement, the rectifier is realized between the overlapped antenna's arms using a 0.7 nm copper oxide. The thin film diode offers low zero bias resistance of 500 Ω, thus improving the impedance matching with the antenna. In addition, the rectenna prototype demonstrates high zero bias responsivity (4 A/W), which is critical in producing DC current directly from THz signals without the application of an external electric source, particularly for energy harvesting applications.
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机译：世界人口对能源的需求不断增长，以及化石燃料储备的迅速减少，共同表明迫切需要确保持久的替代能源和可再生能源。在这里，我们介绍了集成了整流器（整流天线）的太赫兹天线，用于收集红外能量。我们展示了一种共振领结天线，该天线已经过优化，可以在领结尖端产生高度增强的局部场。为了受益于这种增强，整流器是在重叠天线的臂之间使用0.7？nm的氧化铜实现的。薄膜二极管提供500Ω的低零偏置电阻，从而改善了与天线的阻抗匹配。此外，整流天线原型具有较高的零偏置响应度（4 A / W），这对于不使用外部电源直接从THz信号产生直流电流至关重要，特别是在能量收集应用中。
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