Tuning Fano resonances with a nano-chamber of air

被引：11
作者：
Chen, Jianjun [1 ,2 ]
He, Keke [1 ]
Sun, Chengwei [1 ]
Wang, Yujia [1 ]
Li, Hongyun [1 ]
Gong, Qihuang [1 ,2 ]
机构：
[1] Peking Univ, Dept Phys, Collaborat Innovat Ctr Quantum Matter, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
[2] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China
来源：
OPTICS LETTERS | 2016年 / 41卷 / 10期
基金：
中国国家自然科学基金;
关键词：
ELECTROMAGNETICALLY INDUCED TRANSPARENCY; PLASMON-INDUCED TRANSPARENCY; WAVE-GUIDE; OPTICAL METAMATERIALS; RESONATOR SYSTEMS; SYMMETRY-BREAKING; ANALOG; WAVELENGTH; LIGHT;
D O I：
10.1364/OL.41.002145
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
By designing a polymer-film-coated asymmetric metallic slit structure that only contains one nanocavity side-coupled with a subwavelength plasmonic waveguide, the Fano resonance is realized in the experiment. The Fano resonance originates from the interference between the narrow resonant spectra of the radiative light from the nanocavity and the broad nonresonant spectra of the directly transmitted light from the slit. The lateral dimension of the asymmetric slit is only 825 nm. Due to the presence of the soft polymer film, a nano-chamber of air is constructed. Based on the opto-thermal effect, the air volume in the nano-chamber is expanded by a laser beam, which blueshifts the Fano resonance. This tunable Fano resonance in such a submicron slit structure with a nano-chamber is of importance in the highly integrated plasmonic circuits. (C) 2016 Optical Society of America
引用
收藏
页码：2145 / 2148
页数：4
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