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Simultaneous Control of the Spatial and Temporal Spectra of Light with Space-Time Varying Metasurfaces
摘要： This paper presents space-time varying (STV) metasurfaces for simultaneously controlling the spatial and temporal spectra of electromagnetic waves. These metasurfaces transform incident electromagnetic waves into specified reflected and transmitted waves, with arbitrary temporal and spatial frequencies. They are synthesized in terms of time-domain generalized sheet transition conditions (GSTCs). Moreover, they are characterized using an analytical method and the unstaggered finite-difference time-domain (FDTD) technique adapted to space-time metasurfaces. STV metasurfaces performing pulse shaping, time reversal and differentiation are demonstrated as examples.
关键词： space-time varying (STV) medium,Metasurface,generalized sheet transition conditions (GSTC)
更新于2025-09-23 15:22:29
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Simulation of Circular Cylindrical Metasurfaces using GSTC-MoM
摘要： Modeling of circular cylindrical metasurfaces using Method of Moments (MoM) based on Generalized Sheet Transition Conditions (GSTCs) is presented. GSTCs are used to link the integral equations for fields on the inner and outer contour of the circular cylindrical metasurface. The GSTC-MoM is validated by two examples: (1) anisotropic, gyrotropic metasurface capable of two field transformations, (2) non-gyrotropic metasurface capable of transforming field generated by an infinite electric line source at origin to field generated by a displaced electric line source. The formulations presented here can be used as a platform for deriving GSTC-MoM for 3D spherical and conformal metasurfaces.
关键词： GSTC,Integral Equation,Metasurface,MoM,Electromagnetic discontinuity,Boundary condition,Susceptibility,Bianisotropy,Cylindrical
更新于2025-09-10 09:29:36