Journal
MATERIALS LETTERS
Volume 186, Issue -, Pages 53-56Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2016.09.108
Keywords
Simulation and modeling; Carbon materials; Optical materials and properties
Funding
- NSFC [61307042]
- Fujian Provincial Department of Science and Technology [2015H0039]
- Fund of Central Universities [20720150021]
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Modulating near-infrared signals is critical for high density optical interconnects. In order to achieve enhanced modulation effects, we design a near-infrared modulator in combination with a gold nanostripe waveguide and graphene. Conventional assumption of isotropic permittivities for graphene leads to exaggeration of light absorption at the so-called epsilon-near-zero point and extreme overestimation of modulation efficiency, and the anisotropic permittivities assumption faces problems for thickness definition and lower computational efficiency. Therefore, we treat graphene as a 2D conductive surface in the simulation to solve these problems, and investigate the plasmonic effects on modulation enhancement and the trade-off on the modulation efficiency versus the insertion loss. Our method is promising for the design of advanced optical devices based on 2D materials.
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