All-Optical Control of a Single Plasmonic Nanoantenna-ITO Hybrid
All-Optical Control of a Single Plasmonic Nanoantenna-ITO Hybrid
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DOI：
10.1021/nl200901w
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发表时间：
2011-06-01
期刊：
影响因子：
10.8
通讯作者：
Muskens, Otto L.
中科院分区：
文献类型：
--
作者：
Abb, Martina;Albella, Pablo;Muskens, Otto L.
我们实验证明皮秒全光控制的一个单一的等离子体纳米天线嵌入在氧化铟锡（ITO）。我们确定了皮秒响应的天线ITO混合系统，这是明显不同的瞬态漂白观察金天线上的非导电二氧化硅基板。我们的实验结果可以解释由大的自由载流子的非线性ITO，这是增强了由等离子体激元诱导的热电子注入到导电氧化物的金纳米天线。可调谐天线ITO混合物与纳米等离子体能量转移机制的结合，如这里所示，为新的超快器件产生纳米等离子体开关和控制开辟了一条道路。
We demonstrate experimentally picosecond all-optical control of a single plasmonic nanoantenna embedded in indium tin oxide (ITO). We identify a picosecond response of the antenna-ITO hybrid system, which is distinctly different from transient bleaching observed for gold antennas on a nonconducting SiO2 substrate. Our experimental results can be explained by the large free-carrier nonlinearity of ITO, which is enhanced by plasmon-induced hot-electron injection from the gold nanoantenna into the conductive oxide. The combination of tunable antenna-ITO hybrids with nanoscale plasmonic energy transfer mechanisms, as demonstrated here, opens a path for new ultrafast devices to produce nanoplasmonic switching and control.