Investigation of Fano resonances induced by higher order plasmon modes on a circular nano-disk with an elongated cavity
Type
ArticleAuthors
Amin, MuhammadBagci, Hakan

KAUST Department
Computational Electromagnetics LaboratoryComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2014-01-13Online Publication Date
2014-01-13Print Publication Date
2012Permanent link to this record
http://hdl.handle.net/10754/575903
Metadata
Show full item recordAbstract
In this paper, a planar metallic nanostructure design, which supports two distinct Fano resonances in its extinction cross-section spectrum under normally incident and linearly polarized electromagnetic field, is proposed. The proposed design involves a circular disk embedding an elongated cavity; shifting and rotating the cavity break the symmetry of the structure with respect to the incident field and induce higher order plasmon modes. As a result, Fano resonances are generated in the visible spectrum due to the destructive interference between the sub-radiant higher order modes and super-radiant the dipolar mode. The Fano resonances can be tuned by varying the cavity's width and the rotation angle. An RLC circuit, which is mathematically equivalent to a mass-spring oscillator, is proposed to model the optical response of the nanostructure design.Citation
Amin, M., & Bağci, H. (2012). INVESTIGATION OF FANO RESONANCES INDUCED BY HIGHER ORDER PLASMON MODES ON A CIRCULAR NANO-DISK WITH AN ELONGATED CAVITY. Progress In Electromagnetics Research, 130, 187–206. doi:10.2528/pier12040507Sponsors
This work was supported in part by a Academic Excellence Alliance (AEA) program award from King Abdullah University of Science and Technology (KAUST) Global Collaborative Research (GCR) under the title "Energy Efficient Photonic and Spintronic Devices".Publisher
EMW Publishingae974a485f413a2113503eed53cd6c53
10.2528/pier12040507