Chinese Optics Letters, Volume. 19, Issue 12, 123601(2021)
Multifrequency superscattering pattern shaping
Fig. 1. (a) Illustration of a subwavelength multilayered cylindrical structure consisting of six layers of dielectric materials, each of which is coated with a graphene shell. Three-dimensional and two-dimensional views of the structure are shown in the left and right inset, respectively. Graphene shells are represented by black dotted lines. Here, the plane wave is TM-polarized and incident from the left side of the cylinder structure. (b) The scattering spectra (normalized scattering cross section) for the same structure in (a) under the ideal lossless assumption. Both the total scattering spectrum and the partial spectra of the first five scattering terms are shown. The inset in (b) shows the details at the resonance peak circled by a dotted blue line.
Fig. 2. Dispersion of plasmon polaritons versus |RTM| (in logarithmic scale) under the ideal lossless assumption is shown. RTM is the reflection coefficient of the TM-polarized plane wave for the corresponding planar structure. The parameters of the corresponding planar structure are the same as those in Fig.
Fig. 3. Scattering angular distributions for the subwavelength cylinder structure in Fig.
Fig. 4. (a) Influence of graphene’s losses on multifrequency superscattering is shown through the total scattering spectra for different lossy cases. Except τ, other parameters are the same as those in the structure of Fig.
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Yao Qin, Jinying Xu, Yineng Liu, Huanyang Chen. Multifrequency superscattering pattern shaping[J]. Chinese Optics Letters, 2021, 19(12): 123601
Category: Nanophotonics, Metamaterials, and Plasmonics
Received: Mar. 17, 2021
Accepted: May. 14, 2021
Posted: May. 14, 2021
Published Online: Sep. 2, 2021
The Author Email: Yineng Liu (lyn610@xmu.edu.cn)