All-Optical Control of a Single Plasmonic Nanoantenna-ITO Hybrid

被引：259

作者：

Abb, Martina ^{[1
,2
]}

Albella, Pablo ^{[3
,4
]}

Aizpurua, Javier ^{[3
,4
]}

Muskens, Otto L. ^{[1
,2
]}

机构：

[1] Univ Southampton, SEPnet, Southampton SO17 1BJ, Hants, England

[2] Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England

[3] DIPC, Donostia Int Phys Ctr, San Sebastian 20018, Spain

[4] Ctr Fis Mat CSIC UPV EHU, San Sebastian 20018, Spain

来源：

NANO LETTERS | 2011年 / 11卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

Active; plasmonic; nanoantenna; hybrid nanostructures; nanophotonics; ULTRAFAST; DYNAMICS; NONLINEARITY; DEPENDENCE; ELECTRONS; FILMS; GOLD;

D O I：

10.1021/nl200901w

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：2457 / 2463

页数：7

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