Composites with subwavelength features exhibit effective properties that depend on microstructure morphology and materials, which can be adjusted to obtain enhanced characteristics. We detail the systematic design of electromagnetic metamaterials composed dielectric inclusions in a ferroelectric matrix that, under an applied voltage, present optimized tunability higher than bulk due nonlinear l...

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Inverse design has greatly expanded nanophotonic devices and brought optimized performance. However, the use of inverse for plasmonic structures been challenging due to local field concentrations that can lead errors in gradient calculation when continuum adjoint method is used. On other hand, with discrete one achieve exact gradient. Historically version exclusively used a Finite Element model...