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Efficient electro-optic modulation in low-loss graphene-plasmonic slot waveguides.
1Department of Photonics Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark. yudin@fotonik.dtu.dk saxi@fotonik.dtu.dk.
Nanoscale
|October 7, 2017
Summary
Researchers developed efficient graphene-plasmonic waveguide devices for ultra-compact optoelectronics. These devices achieve significant electro-optic modulation with low insertion loss, outperforming previous graphene-plasmonic technologies.
Area of Science:
- Photonics and optoelectronics
- Materials science
- Nanotechnology
Background:
- Surface plasmon polaritons (SPPs) allow light concentration in subwavelength regions.
- This enables device miniaturization and enhanced light-matter interactions.
- Graphene offers unique optoelectronic properties for plasmonic applications.
Purpose of the Study:
- To realize efficient electro-optic modulation in low-loss plasmonic waveguides using graphene.
- To integrate these devices onto a silicon-on-insulator (SOI) platform.
- To explore the potential of graphene plasmonic leaky-mode hybrid waveguides for active ultra-compact devices.
Main Methods:
- Utilizing low-loss plasmonic slot-waveguide modes.
- Exploiting strong optical fields within graphene-covered slots.
- Fabricating graphene-plasmonic waveguide devices on an SOI platform.
Main Results:
- Achieved a tunability of 0.13 dB μm-1.
- Demonstrated extremely low insertion loss.
- Outperformed previously reported graphene-plasmonic devices in terms of performance.
Conclusions:
- Graphene plasmonic leaky-mode hybrid waveguides show great potential.
- These waveguides are suitable for active ultra-compact optoelectronic devices.
- The developed devices represent a significant advancement in integrated photonics.
