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Fundamental bounds for harvesting sunlight with aperture antennae

机译：使用开口天线收集阳光的基本范围

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The tantalizing prospect of using antennae for solar power conversion received preliminary consideration, but was not pursued in earnest due to the daunting challenges in suitable materials, fabrication procedures, and the rectification (conversion to DC power) of frequencies approaching 1 PHz (10~(15) s~(-1)). Recent advances in nano-materials and nano-fabrication technologies have prompted revisiting the solar antenna strategy. Coherence theory informs us that even ostensibly incoherent radiation is partially coherent on a sufficiently small scale. Based on a generalized broadband analysis, we show how the partial coherence of sunlight, exhibiting transverse partial coherence on a scale of two orders of magnitude larger than its characteristic wavelengths, impacts the potential of harvesting solar energy with aperture antennae (coherent detectors), and establish a fundamental bound. These results quantify the tradeoff between intercepted power and averaged intensity with which the effect of increasing antenna size (and hence greater system simplicity) can be evaluated.
机译：使用天线进行太阳能转换的诱人前景已得到初步考虑，但由于在合适的材料，制造程序以及频率接近1 PHz（10〜（ 15）s〜（-1））。纳米材料和纳米制造技术的最新进展促使人们重新审视太阳能天线策略。相干理论告诉我们，即使表面上不相干的辐射在足够小的范围内也是部分相干的。基于广义宽带分析，我们展示了在比其特征波长大两个数量级的尺度上表现出横向局部相干性的日光部分相干性如何影响通过孔径天线（相干探测器）收集太阳能的潜力，以及建立基本的界限。这些结果量化了在截取功率和平均强度之间的权衡，通过该权衡，可以评估天线尺寸增大（进而提高系统简便性）的效果​​。

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