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Plasmonic modulators based on enhanced interaction between graphene and localized transverse-electric plasmonic mode.
Optics Express
|November 22, 2024
Summary
Researchers developed a novel graphene/split ring-like plasmonic waveguide modulator. This device achieves record high modulation depth and low insertion loss for integrated optics, enabling faster and more efficient nanophotonic devices.
Area of Science:
- Nanophotonics and integrated optics
- Plasmonics
- Optoelectronics
Background:
- Active plasmonic modulators are crucial for nanophotonics and integrated optics, requiring high modulation depth, low energy consumption, high speed, and small footprints.
- Existing modulators face challenges in balancing these performance metrics.
Purpose of the Study:
- To propose and demonstrate a high-performing plasmonic modulator based on a graphene/split ring-like plasmonic waveguide (SRPW) system.
- To enhance light-matter interaction in waveguide systems for advanced optoelectronic devices.
Main Methods:
- Constructing a transverse-electric (TE) plasmonic mode.
- Maximizing the in-plane component of the plasmonic mode localized on the graphene surface.
- Utilizing a graphene/split ring-like plasmonic waveguide (SRPW) system.
Main Results:
- Achieved a record high modulation depth of 20.46 dB/µm.
- Attained a suppressed insertion loss of 0.248 dB/µm at a telecom wavelength of 1310 nm.
- Demonstrated broadband operation from 800-1650 nm with low energy consumption (0.43 fJ/bit) and high modulation speed (200 GHz).
Conclusions:
- The proposed graphene/SRPW modulator offers superior performance metrics compared to existing devices.
- This design presents a novel approach for enhancing light-matter interaction, paving the way for next-generation on-chip optoelectronic devices.
