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Single-layer graphene optical modulator based on arrayed hybrid plasmonic nanowires.
Optics Express
|October 7, 2021
Summary
This study introduces a tunable graphene optical modulator using hybrid plasmonic nanowires. The device enhances light-matter interactions for efficient modulation, offering potential for advanced optoelectronic devices.
Area of Science:
- Photonics and Optoelectronics
- Materials Science
- Nanotechnology
Background:
- Surface plasmon-polaritons (SPPs) are crucial for light manipulation.
- Graphene's 2D nature requires enhanced light-matter interaction for device applications.
- Hybrid plasmonic nanowires offer subwavelength confinement and long propagation distances.
Purpose of the Study:
- To propose and demonstrate a tunable graphene optical modulator.
- To leverage gap-surface plasmonic modes (GSPMs) and near-field coupling for enhanced light-matter interaction.
- To optimize modulation depth, insertion loss, and bandwidth.
Main Methods:
- Design of an arrayed hybrid plasmonic nanowire structure.
- Utilizing periodic metasurface for strong subwavelength confinement.
- Graphene integration for tunable optical modulation.
Main Results:
- Achieved a typical modulation depth (MD) of 4.7 dB/μm and insertion loss (IL) of 0.045 dB/μm.
- Optimized performance yielded MD of 16.7 dB/μm and IL of 0.17 dB/μm.
- Demonstrated a 3 dB bandwidth of 200 GHz with low energy consumption (0.86 fJ/bit).
Conclusions:
- The proposed graphene optical modulator exhibits excellent performance.
- The design is compatible with fabrication and offers integration potential.
- This work paves the way for 2D material-based optoelectronic devices.
