Robust tuning of high-Q spoof plasmonic cavity with surface defect

被引:0
作者
Wu, Hong-Wei [1 ,2 ,3 ]
Chen, Hua-Jun [1 ]
Fan, Ren-Hao [2 ,3 ]
Li, Yang [1 ]
Sheng, Zong-Qiang [1 ]
机构
[1] Anhui Univ Sci & Technol, Sch Mech & Photoelect Phys, Huainan 232001, Peoples R China
[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[3] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Sch Phys, Nanjing 210093, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
MICROCAVITY; MICROSPHERES; LASERS; MODES;
D O I
10.7567/APEX.11.062202
中图分类号
O59 [应用物理学];
学科分类号
摘要
We demonstrate that tunable whispering gallery modes can be supported in a spoof plasmonic cavity with a deep-subwavelength scale by inserting periodic metal strips into a silicon cylinder. The resonant frequencies of modes can be tuned freely by properly tailoring the structural parameters. Furthermore, we also show that the resonant modes can keep a high quality factor for a defect existing on the surface of the spoof plasmonic cavity by switching the whispering gallery resonance to Fabry-Perot-like resonance, which is absent for the traditional whispering gallery cavities. This property indicates potential applications in the design of optical cavities at low frequencies. (C) 2018 The Japan Society of Applied Physics
引用
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页数:4
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