期刊
JOURNAL OF OPTICS
卷 18, 期 11, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/18/11/115002
关键词
harmonic generation; plasmonics; nanophotonics; nanoantennas; frequency mixing; upconversion
类别
资金
- National Research Council Research Associateship award at the US Army AMRDEC
Near field amplification of electric fields magnifies the nonlinear optical signals generated in the metal volume of plasmonic nanoantennas, as well as in the surrounding media. We investigate the third harmonic light emitted by a hybrid nanoantenna composed of two metallic rods separated by a small gap filled with a dielectric. Despite the large cubic nonlinear susceptibility of metals, the presence of a hot spot in the antenna's gap may easily transform weaker dielectric nonlinearities into the dominant source of third harmonic light. This has led to diverse and sometimes opposite interpretations of the nature of the nonlinear response, which are further complicated by the limited knowledge of the intrinsic nonlinear susceptibilities of the constituent materials. Here, a quantitative description of third harmonic generation is provided as a function of the ratio between the dielectric and the metal nonlinear susceptibilities in a hybrid metaldielectric nanoantenna. We find a spectral discriminator that allows us to determine the origin of third harmonic light unambiguously.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据