Modeling of a Metalens Singlet Based on Half-Wave Plate Model

Well designed rectangular nanofin structures, with proper geometry and material, can be used to modulate the phase of the transmitted field. By rotating the orientation of each nanofin, the phase modulation changes accordingly. Based on this principle, one can assemble a complete metalens using nanofins with spatially varying orientations. Such a metalens is sensitive to the polarization of the input field and in this example, we demonstrate the polarization behavior.

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