TY - JOUR
T1 - Investigation of Fano resonances induced by higher order plasmon modes on a circular nano-disk with an elongated cavity
AU - Amin, Muhammad
AU - Bagci, Hakan
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: 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".
PY - 2014/1/13
Y1 - 2014/1/13
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/575903
UR - http://www.jpier.org/PIER/pier.php?paper=12040507
U2 - 10.2528/pier12040507
DO - 10.2528/pier12040507
M3 - Article
SN - 1070-4698
VL - 130
SP - 187
EP - 206
JO - Progress in Electromagnetics Research
JF - Progress in Electromagnetics Research
ER -