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Small footprint symmetrical graphene hybrid plasmonic waveguides for high-speed broadband optical modulation
- Source :
- Journal of the Optical Society of America B. 37:2696
- Publication Year :
- 2020
- Publisher :
- Optica Publishing Group, 2020.
-
Abstract
- In this work, nanowire-based symmetrical graphene hybrid plasmonic waveguides for possible broadband optical modulation have been proposed. The full-vectorial finite element method has been employed to analyze the modal properties and modulation characteristics of the proposed structures. The fundamental supermode supported by these geometries is evolved from a near-field coupling between metallic and dielectric nanowires. Here, the strong optical capacitance effect in the low-index dielectric gap region has been exploited to enhance light–graphene interaction in the subwavelength device size. Thus, the optical absorption of graphene significantly increases. Therefore, the structures even with their small footprints offer a very high extinction ratio and small energy consumption per bit (as low as 0.9 fJ/bit), simultaneously with appreciably high modulation bandwidth at the telecommunication wavelength. A substantially small variation of modulation performance for a broad range of operation wavelength and gap widths suggest their broadband operability. Furthermore, the modulation performance has been studied incorporating the optical anisotropy of graphene. Thus, the proposed waveguides show a good promise in high-speed broadband optical modulation.
- Subjects :
- Materials science
Extinction ratio
business.industry
Graphene
Nanowire
Physics::Optics
Statistical and Nonlinear Physics
Dielectric
01 natural sciences
Capacitance
Atomic and Molecular Physics, and Optics
law.invention
010309 optics
Wavelength
Modulation
law
0103 physical sciences
Broadband
Optoelectronics
business
Subjects
Details
- ISSN :
- 15208540 and 07403224
- Volume :
- 37
- Database :
- OpenAIRE
- Journal :
- Journal of the Optical Society of America B
- Accession number :
- edsair.doi...........26842920eb0fce6d258b00eec342c160
- Full Text :
- https://doi.org/10.1364/josab.390775