Ultrahigh-efficiency Enhanced Four-wave-mixing in Si-Ge-Graphene Photonic Crystal Waveguide

Title:Ultrahigh-efficiency Enhanced Four-wave-mixing in Si-Ge-Graphene Photonic Crystal Waveguide

Volume: 1 Issue: 3

Author(s): Yujun Hou and Chun Jiang*

Affiliation:

• State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240,China

Keywords: Graphene, four-wave-mixing, ultrahigh-efficiency, photonic crystal waveguide, nonlinear, all-optical signalprocessing.

Abstract: Background: All-optical processing has a huge superiority in speed and efficiency than traditional optical-electrical-optical signal processing. Four-wave-mixing is an important nonlinear parametric process to achieve all-optical processing.

Objective: We proposed the photonic crystal waveguide to enhance the conversion efficiency of four-wave-mixing significantly in practical application.

Methods: We demonstrated a waveguide composed of silicon with mono-layer graphene-coated as core and Si-Ge distributed periodically on both sides as cladding. By the introduction of the slow light effect of Si-Ge photonic crystal and the localization effect of graphene, the conversion efficiency of four-wave-mixing had enhanced dramatically.

Results: The conversion efficiency can be increased by 16dB compared with a silicon waveguide. The maximum efficiency as high as -9.1dB can be achieved in the Si-Ge-Graphene photonic crystal waveguide (SGG-PhCWG). The propagation loss can be decreased to 0.032dB/cm.

Conclusion: Numerical results of the proposed SGG-PhCWG matched well with nonlinear coupled- mode theory. This configuration offered a new physical mechanism and solution for alloptical signal processing and high-efficiency nonlinear nanoscale devices.

Cite this article as:

Hou Yujun and Jiang Chun *, Ultrahigh-efficiency Enhanced Four-wave-mixing in Si-Ge-Graphene Photonic Crystal Waveguide, Current Chinese Science 2021; 1 (3) . https://dx.doi.org/10.2174/2210298101666210204162631

DOI https://dx.doi.org/10.2174/2210298101666210204162631	Print ISSN 2210-2981
Publisher Name Bentham Science Publisher	Online ISSN 2210-2914