Plasmonic nanoantenna design and fabrication based on evolutionary optimization.
Plasmonic nanoantenna design and fabrication based on evolutionary optimization.
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DOI：
10.1364/oe.25.010828
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发表时间：
2015-11
期刊：
影响因子：
3.8
通讯作者：
T. Feichtner;O. Selig;B. Hecht
中科院分区：
文献类型：
--
作者：
T. Feichtner;O. Selig;B. Hecht
纳米天线可以为光通信、传感和光谱学定制光-物质相互作用。他们的设计灵感来自于射频规则，这些规则在光学频率下部分分解。在这里，我们发现意想不到的纳米天线设计表现出强光定位和增强，通过使用一个通用的和可扩展的进化算法的基础上的FDTD模拟，也占几何制造的限制。由此产生的纳米天线是“印刷”直接通过聚焦离子束铣削和他们的健身排名实验验证双光子光致发光。我们发现最好的天线的工作原理偏离经典的无线电波启发的设计。我们的工作为进化优化在纳米光子学中的广泛应用奠定了基础。
Nanoantennas can tailor light-matter interaction for optical communication, sensing, and spectroscopy. Their design is inspired by radio-frequency rules which partly break down at optical frequencies. Here we find unexpected nanoantenna designs exhibiting strong light localization and enhancement by using a general and scalable evolutionary algorithm based on FDTD simulations that also accounts for geometrical fabrication constraints. The resulting nanoantennas are "printed" directly by focused-ion beam milling and their fitness ranking is validated experimentally by two-photon photoluminescence. We find the best antennas' operation principle deviating from that of classical radio wave-inspired designs. Our work sets the stage for a widespread application of evolutionary optimization in nano photonics.