Abstract
In this paper, a 4L-shaped graphene patterned polarization-insensitive plasmon-induced transparency (PIT) metamaterial structure is proposed. The photoelectric switch based on this structure supports a variety of light sources, such as linearly polarized light with different polarization directions, left rotation circularly polarized light (LCP) and right rotation circularly polarized light (RCP). And the switch has excellent performance in the case of different light sources, the amplitude modulation is as high as 99.01%, and the insertion loss is as low as 0.04 dB. In addition, the PIT metamaterial has a high refractive index sensitivity of up to 49156 nm/RIU. The group index of the PIT metamaterial is as high as 980, which can achieve excellent slow light effect. This study provides a scheme and guidance for the design of optoelectronic devices.
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