Abstract
With the aim to further reduce insertion loss, we propose the design of a real-time waveform modulator by engineering the dispersion of magnetic surface plasmons (MSPs). The magnetic fields of MSPs are strongly localized, which is different from conventional electric surface plasmons (ESPs). Since there are no magnetic media in the design, the transmission loss of MSPs resulting from dielectric loss is lower than that of ESPs. Therefore, a waveform modulator with lower insertion loss can be realized. As an example, we demonstrate a real-time waveform modulator operating in the X band. Both the simulation and experiment prove that the waveform modulator is broadband and high-efficiency. The design method can also be applied to the design of a true-time delayer, a real-time Fourier transformer, a true-time compressor, and so on.
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