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The Mixed Finite-Element Method With Mass Lumping for Computing Optical Waveguide Modes
A new mixed finite-element method is proposed for computing the anisotropic, lossy, and open waveguide modes. By incorporating Gauss' law into the vectorial wave equation, the variational formulation
Broadband absorber with periodically sinusoidally-patterned graphene layer in terahertz range.
We demonstrate that a broadband terahertz absorber with near-unity absorption can be realized using a net-shaped periodically sinusoidally-patterned graphene sheet, placed on a dielectric spacer
Strongly Confined Spoof Surface Plasmon Polaritons Waveguiding Enabled by Planar Staggered Plasmonic Waveguides
The investigation results show the proposed PSPWs have excellent performance of deep subwavelength spoof SPPs confinement, long propagation length and low bend loss, as well as great design flexibility to engineer the propagation properties by adjusting their geometry dimensions and material parameters.
A Slot-Based Surface Plasmon-Polariton Waveguide With Long-Range Propagation and Superconfinement
A full-vector spectral element method (SEM) is applied to model and simulate surface plasmon-polariton (SPP) waveguides. Gauss-Lobatto-Legendre (GLL) polynomials are used to construct higher-order
The Efficient Mixed FEM With the Impedance Transmission Boundary Condition for Graphene Plasmonic Waveguides
A mixed finite-element method with an impedance transmission boundary condition (ITBC) is proposed to solve the graphene plasmonic modes. The new variational formulation combines the Gauss' law with
Spectral Numerical Mode Matching Method for Metasurfaces
The SNMM method is a semianalytical solver that solves for the Bloch eigenmodes in the horizontal directions by using the mixed spectral-element method (MSEM) numerically, but determines the scattering in the vertical direction analytically through eigenmode propagation.
Electrically Tunable Broadband Terahertz Absorption with Hybrid-Patterned Graphene Metasurfaces
A broadband terahertz absorber that is based on a hybrid-patterned graphene metasurface with excellent properties of polarization insensitivity, wide-angle, and active tunability that may have promising applications in teraherstz sensing, detecting, imaging, and cloaking is numerically demonstrated.
Independent tuning of double plasmonic waves in a free-standing graphene-spacer-grating-spacer-graphene hybrid slab.
The independent excitation and tuning of double plasmonic waves are realized in a free-standing graphene-spacer-grating-spacer-graphene (GSGSG) hybrid slab, which consists of two graphene field
Terahertz Absorber With Reconfigurable Bandwidth Based on Isotropic Vanadium Dioxide Metasurfaces
Simulated results show that absorptance peak can be tuned from 5% to 100% when the conductivity changes continually from <inline-formula><tex-math notation="LaTeX">$\text{10}\ {\Omega ^{ - 1}}{\text{cm}^{ - 1}$</tex- math></inline- formula>.
Doubly mirror-induced electric and magnetic anapole modes in metal-dielectric-metal nanoresonators.
This work will pave a new way for tailoring and boosting anapole modes in metal-dielectric hybrid nanoresonators and open up new opportunities for many significant applications in nonlinear and quantum nanophotonics.