Asymmetric light reflectance by Fano resonance between Fresnel reflection and localized surface plasmons

被引：5
|
作者：
Wang, He [1 ]
Li, Penggang [1 ]
Gao, Na [1 ]
Huang, Kai [1 ]
Kang, Junyong [1 ]
Ji, Li [2 ]
Yu, Edward [2 ]
机构：
[1] Xiamen Univ, Collaborat Innovat Ctr Optoelect Semicond & Effic, Dept Phys, Fujian Prov Key Lab Semicond & Applicat, Xiamen 361005, Peoples R China
[2] Univ Texas Austin, Microelect Res Ctr, Dept Elect & Comp Engn, Austin, TX 78758 USA
来源：
APPLIED PHYSICS EXPRESS | 2018年 / 11卷 / 09期
基金：
中国国家自然科学基金;
关键词：
GOLD; ARRAYS;
D O I：
10.7567/APEX.11.092001
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The asymmetric light reflectance behavior arising from the Fano interference between Fresnel reflection and localized surface plasmons (LSPs) is investigated. Finite-difference time-domain (FDTD) simulation results demonstrate that, when light is incident from air, reflectance spectra show peaks at the LSP resonance wavelength regardless of the metal nanoparticle density. When light is incident from the substrate, reflectance spectra show typical Fano profiles. This phenomenon can be attributed to different reflectance phase shifts induced when light is incident from different directions. Experiments are conducted with Ag-nanoparticle-coated quartz wafers. The measured spectra are in good agreement with the simulated results. (C) 2018 The Japan Society of Applied Physics
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页数：4
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