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Electro-optical switch based on continuous metasurface embedded in Si substrate
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Switchable metasurfaces with fast responses and high efficiency are highly desirable in various applications. In this paper, we propose and analyze a novel electro-optical switch based on continuous metasurface embedded in Si substrate. The simulative results indicate that the embedded and continuous metasurface structure is able to increase the interaction volume between the metal antennas and the surrounding substrate, hence enhances the tuning effect when changing the refractive index of Si by an injection current, resulting in fully switching between anomalous and normal reflections, and achieving a high extinction ratio even under a smaller refractive index variation.
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