期刊
NANO LETTERS
卷 21, 期 1, 页码 51-59出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c02991
关键词
Plasmonics; Meta-atoms; Nonlinear Optics; Hyperpolarizability; Anharmonic RLC oscillator
类别
资金
- Canada Research Chairs (CRC) Program
- Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery program
- Ontario Graduate Scholarship (OGS)
- University of Ottawa Excellence Scholarship
- University of Ottawa International Experience Scholarship
- NSERC Canada Graduate Scholarship-Master's (CGSM) Program
- Academy of Finland [308596]
- Flagship of Photonics Research and Innovation (PREIN) - Academy of Finland [320165]
- General Secretariat for Research and Technology(GSRT)
- Hellenic Foundation for Research and Innovation (HFRI) [1819]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy within the Cluster of Excellence PhoenixD [EXC 2122, 390833453]
Researchers have developed an RLC circuit model to estimate the nonlinear optical properties of meta-atoms, overcoming the current difficulty in determining their nonlinear optical properties. Results from different methods agree well, indicating that the RLC model can efficiently design nonlinear plasmonic metasurfaces.
Plasmonic metasurfaces are promising as enablers of nanoscale nonlinear optics and flat nonlinear optical components. Nonlinear optical responses of such metasurfaces are determined by the nonlinear optical properties of individual plasmonic meta-atoms. Unfortunately, no simple methods exist to determine the nonlinear optical properties (hyperpolarizabilities) of the meta-atoms hindering the design of nonlinear metasurfaces. Here, we develop the equivalent RLC circuit (resistor, inductor, capacitor) model of such metaatoms to estimate their second-order nonlinear optical properties, that is, the first-order hyperpolarizability in the optical spectral range. In parallel, we extract from second-harmonic generation experiments the first-order hyperpolarizabilities of individual meta-atoms consisting of asymmetrically shaped (elongated) plasmonic nanoprisms, verified with detailed calculations using both nonlinear hydrodynamic-FDTD and nonlinear scattering theory. All three approaches, analytical, experimental, and computational, yield results that agree very well. Our empirical RLC model can thus be used as a simple tool to enable an efficient design of nonlinear plasmonic metasurfaces.
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