All-optical control of a single plasmonic nanoantenna-ITO hybrid.
basic_science · Level V
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- Record sourced from PubMed, PMID 21542564.
- Also identified by DOI 10.1021/nl200901w.
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Abstract
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 SiO(2) 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.
Medical subject headings
- Gold
- Metal Nanoparticles
- Tin Compounds