A high speed optical modulator based on graphene-on-graphene hybrid nanophotonic waveguide

Using an important feature of the hybrid graphene nanophotonic waveguide that TM and TE modes residing in two separated areas, we design a TE mode modulator and optimize its performance by tuning the ridge width and the low index layer height. Furthermore, the essential parameters including the inse...

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Bibliographic Details
Published in:Optik (Stuttgart) 2019-02, Vol.179, p.216-221
Main Authors: Lu, Yang, Cai, Kesu, Li, Yuee, Duan, Zhizhen, Xi, Yang, Wang, Zhong
Format: Article
Language:English
Subjects:
Electron optics
Electrooptic modulation
Graphene
Hybrid integrated circuits
Photonics
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Summary:Using an important feature of the hybrid graphene nanophotonic waveguide that TM and TE modes residing in two separated areas, we design a TE mode modulator and optimize its performance by tuning the ridge width and the low index layer height. Furthermore, the essential parameters including the insertion loss, the modulation depth, the bandwidth and figure of merit have been investigated. Our designed modulator demonstrates a 3-dB modulation depth with extra-small dimension (2 μm × 1.1 μm × 12.17 μm) and then a small footprint (0.5 μm × 12.17 μm) can be achieved. In addition, the modulator offers a broad working wavelength range and 80 GHz high modulation bandwidth upon the energy 108.8 fJ/bit.
ISSN:0030-4026
1618-1336
DOI:10.1016/j.ijleo.2018.10.106