A Compact Graphene Modulator Based on Localized Surface Plasmon Resonance with a Chain of Metal Disks
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Most graphene electro-optic modulators based on the electro-refractive modulation are composed of Mach-Zehnder interferometer or microring resonator structures and have a relative compact size comparing with dielectric ones. To further shrink the footprint, we use the localized surface plasmon resonance of a chain of three metal disks to realize a submicron graphene modulator, whose length can be reduced to less than 1 μm. The proposed graphene modulator has an extinction ratio of 5.5 dB with a length of only 740 nm. And the insertion loss, 3-dB bandwidth, and power consumption of the modulator are 1.9 dB, 83.4 GHz, and 8.55 fJ/bit respectively.
KeywordsGraphene Localized surface plasmon Modulator
This work was supported by the National Science Foundation of Jiangsu Province Grant (BK 20161429) and the National Natural Science Foundation of China under Grant (61601118).
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