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Volume 7
Issue 4
10.3390/photonics7040124
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Article

Abnormal Fano Profile in Graphene-Wrapped Dielectric Particle Dimer

by
Yang Huang
1,*,
Pujuan Ma
2 and
Ya Min Wu
1
1
School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China
2
Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
*
Author to whom correspondence should be addressed.
Photonics 2020, 7(4), 124; https://doi.org/10.3390/photonics7040124
Submission received: 4 November 2020 / Revised: 30 November 2020 / Accepted: 2 December 2020 / Published: 3 December 2020
(This article belongs to the Special Issue Recent Advances in the Study of Light Propagation in Optical Fibers)
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Abstract

We give a theoretical study on the near field enhancement and far field spectrum of an adjacent graphene-wrapped sphere dimer with different radii. The Fano profile is found in the near field enhancement spectrum of such a symmetry-broken dimer system, which is, however, hidden in the far field spectrum. We demonstrate that this kind of Fano profile is rising from the coupling of dimer’s plasmon hybridization modes by analyzing the dipole moments of each sphere. Moreover, different orientation of incident wave polarization will lead to the different plasmon hybridization coupling, thus giving rise to a different Fano profile. By changing the Fermi energy level, we could achieve tunable Fano profile in near field enhancement.
Keywords: plasmons hybridization; Fano resonance; graphene; dimer; dipole–dipole limit plasmons hybridization; Fano resonance; graphene; dimer; dipole–dipole limit
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MDPI and ACS Style

Huang, Y.; Ma, P.; Wu, Y.M. Abnormal Fano Profile in Graphene-Wrapped Dielectric Particle Dimer. Photonics 2020, 7, 124. https://doi.org/10.3390/photonics7040124

AMA Style

Huang Y, Ma P, Wu YM. Abnormal Fano Profile in Graphene-Wrapped Dielectric Particle Dimer. Photonics. 2020; 7(4):124. https://doi.org/10.3390/photonics7040124

Chicago/Turabian Style

Huang, Yang, Pujuan Ma, and Ya Min Wu. 2020. "Abnormal Fano Profile in Graphene-Wrapped Dielectric Particle Dimer" Photonics 7, no. 4: 124. https://doi.org/10.3390/photonics7040124

APA Style

Huang, Y., Ma, P., & Wu, Y. M. (2020). Abnormal Fano Profile in Graphene-Wrapped Dielectric Particle Dimer. Photonics, 7(4), 124. https://doi.org/10.3390/photonics7040124

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