Fano plasmonics goes nonlinear

被引:3
作者
Sukharev, Maxim [1 ,2 ]
Drobnyh, Elena [2 ]
Pachter, Ruth [3 ]
机构
[1] Arizona State Univ, Coll Integrat Sci & Arts, Mesa, AZ 85212 USA
[2] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA
[3] Air Force Res Lab Mat & Mfg Directorate, Dayton, OH 45433 USA
关键词
ENHANCED 2ND-HARMONIC GENERATION; RESONANCES; NANOSTRUCTURES; ARRAYS;
D O I
10.1063/5.0109872
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We investigate the process of the second harmonic generation by plasmonic nano-antennas that exhibit Fano-like resonances. A rigorous fully vectorial Maxwell-hydrodynamics approach is employed to directly calculate the second order susceptibilities as function of the pump frequency, considering a periodic array of nanodolmens comprised of three Au nanorods. The results of the numerical simulations demonstrate noticeable enhancement of the second harmonic efficiency by the antisymmetric mode. Additionally, a simple analytical model based on two coupled nonlinear oscillators is proposed. It is shown that the second order optical response can be significantly enhanced at the frequency of the antisymmetric normal mode thus supporting our numerical results. Published under an exclusive license by AIP Publishing.
引用
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页数:8
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