Nonlinear Optical Response from Arrays of Au Bowtie Nanoantennas
Nonlinear Optical Response from Arrays of Au Bowtie Nanoantennas
复制标题
DOI：
10.1021/nl102751m
复制
发表时间：
2011-01-01
期刊：
影响因子：
10.8
通讯作者：
Toussaint, Kimani C., Jr.
中科院分区：
文献类型：
--
作者：
Ko, Kaspar D.;Kumar, Anil;Toussaint, Kimani C., Jr.
我们证明了，当使用天线的周期性阵列时，可以有利地修改单个Au蝴蝶结纳米天线的光学响应，以将馈电间隙区域中的局部强度增加10（3）倍。我们发现，阵列的周期性可以用来调制和整形的光谱发射。对发射的分析证实了典型的金纳米结构的二次谐波产生和双光子光致发光的存在，但也揭示了不能归因于单个多光子过程的发射光谱的一部分。我们的研究对于理解共振纳米结构在设计下一代光子技术的光学天线中的作用具有重要意义。
We demonstrate that the optical response of a single Au bowtie nanoantenna can be favorably modified to increase the local intensity by a factor of 10(3) in the feed gap region when a periodic array of antennas are used. We find that the array periodicity can be used to modulate and shape the spectral emission. An analysis of the emission confirms the presence of second-harmonic generation and two-photon photoluminescence, typical of gold nanostructures, but also reveals a portion of the emitted spectrum that cannot be attributed to a single multiphoton process. Our investigations have important implications for understanding the role of resonant nanostructures in designing optical antennas for next-generation photonic technologies.