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Low-loss hybrid plasmonic waveguide for compact and high-efficient photonic integration
Yao Kou1, Fangwei Ye, Xianfeng Chen
1Department of Physics, The State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems, Shanghai Jiao Tong University, Shanghai, China.
Optics Express
|July 1, 2011
Summary
Researchers developed a novel hybrid plasmonic waveguide by merging silicon photonics with silver nanowires. This new waveguide offers efficient light confinement and propagation, paving the way for dense photonic circuits.
Area of Science:
- Photonics
- Nanotechnology
- Materials Science
Background:
- Conventional silicon waveguides face limitations in light confinement.
- Plasmonic waveguides offer subwavelength confinement but suffer from high losses.
- Integrating dielectric and plasmonic components is crucial for advanced optical devices.
Purpose of the Study:
- To introduce and characterize a novel hybrid plasmonic waveguide.
- To leverage the advantages of both silicon photonics and plasmonics.
- To explore potential applications in high-density photonic integration.
Main Methods:
- Coupling photonic modes of a silicon (Si) waveguide with higher-order plasmonic modes of a silver nanowire.
- Characterization of the hybrid modes' properties, including mode area and propagation distance.
- Measurement of excitation efficiency from dielectric modes to hybrid modes.
Main Results:
- The hybrid modes exhibit significantly small mode areas, enabling strong light confinement.
- Long propagation distances were achieved, mitigating plasmonic losses.
- High excitation efficiency (~90%) was demonstrated from conventional dielectric modes into the hybrid modes.
Conclusions:
- The developed hybrid plasmonic waveguide effectively combines the benefits of dielectric and plasmonic confinement.
- This technology shows promise for overcoming limitations in current photonic integration.
- Potential applications include advanced optical circuits and devices requiring high-density integration.
