Multiple invisibility regions induced by symmetry breaking in a trimer of subwavelength graphene-coated nanowires

Fesenko, Volodymyr I.; Shcherbinin, Vitalii I.; Tuz, Vladimir R.

doi:10.1364/josaa.35.001760

Cited by 14 publications

(10 citation statements)

References 46 publications

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“…Recently, graphene has also been proposed as a coating material [18][19][20][21]. While this approach is very effective, its implementation at the nanoscale remains a complex task with the current technological resources.…”

Section: Introductionmentioning

confidence: 99%

Transparency and perfect absorption of all-dielectric resonant metasurfaces governed by the transverse Kerker effect

Shamkhi

Sayanskiy

Valero

et al. 2019

Phys. Rev. Materials

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Dielectric metasurfaces perform unique photonics effects and serve as the engine of nowadays lightmatter technologies. Here, we suggest theoretically and demonstrate experimentally the realization of a high transparency effect in a novel type of all-dielectric metasurface, where each constituting meta-atom of the lattice presents the so-called transverse Kerker effect. In contrast to Huygens' metasurfaces, both phase and amplitude of the incoming wave remain unperturbed at the resonant frequency and, consequently, our metasurface totally operates in the invisibility regime. We prove experimentally, for the microwave frequency range, that both phase and amplitude of the transmitted wave from the metasurface remain almost unaffected. Finally, we demonstrate both numerically and experimentally and explain theoretically in detail a novel mechanism to achieve perfect absorption of the incident light enabled by the resonant response of the dielectric metasurfaces placed in the vicinity of a conducting substrate. In the subdiffractive limit, we show the aforementioned effects are mainly determined by the optical response of the constituting meta-atoms rather than the collective lattice contributions. With the spectrum scalability, our findings can be incorporated in engineering devices for energy harvesting, nonlinear phenomena and filters applications.

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Section: Introductionmentioning

confidence: 99%

Transparency and perfect absorption of all-dielectric resonant metasurfaces governed by the transverse Kerker effect

Shamkhi

Sayanskiy

Valero

et al. 2019

Phys. Rev. Materials

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“…The scattering efficiency and field distributions were shown in Figure 12c,d. Later, invisibility in a trimer of GCNWs was presented by Fesenko et al [128]. For TM-polarized incident waves, the normalized scattering cross-section spectra of all structures (GCNW, GCNW dimer, GCNM trimer) behaved similarly and exhibited a single invisible region.…”

Section: Optical Cloakingmentioning

confidence: 91%

Graphene-Coated Nanowire Waveguides and Their Applications

Teng

Wang

2020

Nanomaterials

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In recent years, graphene-coated nanowires (GCNWs) have attracted considerable research interest due to the unprecedented optical properties of graphene in terahertz (THz) and mid-infrared bands. Graphene plasmons in GCNWs have become an attractive platform for nanoscale applications in subwavelength waveguides, polarizers, modulators, nonlinear devices, etc. Here, we provide a comprehensive overview of the surface conductivity of graphene, GCNW-based plasmon waveguides, and applications of GCNWs in optical devices, nonlinear optics, and other intriguing fields. In terms of nonlinear optical properties, the focus is on saturable absorption. We also discuss some limitations of the GCNWs. It is believed that the research of GCNWs in the field of nanophotonics will continue to deepen, thus laying a solid foundation for its practical application.

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“…This, for instance, was demonstrated in [21] where the THz wave scattering and absorption by a graphene strip grating embedded into a dielectric slab was analyzed with the aid of regularizing method-of-moments. Curved graphene-dielectric configurations studied so far have been mainly restricted to fully covered circular dielectric rods [22][23][24][25]. Arbitrary dielectric rod, fully covered with graphene, was analyzed with boundary integral equation in [26].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Our study has shown that the best fit of the first-order plasmon-mode resonance is provided by / 4    . Note that the expression (21) is more accurate than equation (25) of [10], which can be obtained by setting Z = 0.…”

Section: Graphene Conductivity and Plasmon Resonancesmentioning

confidence: 99%

Combined plasmon-resonance and photonic-jet effect in the THz wave scattering by dielectric rod decorated with graphene strip

Dukhopelnykov

Sauleau

Garcia-Vigueras

et al. 2019

Journal of Applied Physics

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We consider the scattering of an H-polarized plane wave by an infinite dielectric rod with a conformal graphene strip of arbitrary angular width, placed at the rod rear side. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method, which has a guaranteed convergence. This meshless trusted computational instrument enables us to plot the dependences of the absorption cross-section (ACS) and the total scattering cross-section (TSCS) on the strip angular width and the frequency, in wide range from 1 GHz to 6 THz. We concentrate our analysis on studying the interplay between the broadband photonic-jet effect of dielectric rod and the reasonably high-Q resonances on the plasmon modes of graphene strip. It is found that as the photonic jet becomes brighter with higher frequencies, the plasmon-mode resonances become more intensive as well.

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Multiple invisibility regions induced by symmetry breaking in a trimer of subwavelength graphene-coated nanowires

Cited by 14 publications

References 46 publications

Transparency and perfect absorption of all-dielectric resonant metasurfaces governed by the transverse Kerker effect

Transparency and perfect absorption of all-dielectric resonant metasurfaces governed by the transverse Kerker effect

Graphene-Coated Nanowire Waveguides and Their Applications

Combined plasmon-resonance and photonic-jet effect in the THz wave scattering by dielectric rod decorated with graphene strip

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