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Broadband silicon optical modulator using a graphene-integrated hybrid plasmonic waveguide.
1Department of Electrical Engineering, KAIST, Daejeon 34141, Korea.
Nanotechnology
|August 22, 2015
Summary
This study introduces a broadband silicon optical modulator using graphene-integrated hybrid plasmonic waveguides. The device achieves high on/off extinction ratios, paving the way for advanced graphene-silicon photonic integrated circuits.
Area of Science:
- Photonics
- Materials Science
- Electrical Engineering
Background:
- Graphene exhibits exceptional electronic and photonic properties, making it suitable for silicon-based electronic-photonic integrated circuits.
- Silicon photonics is a key technology for high-bandwidth optical communication and computation.
Purpose of the Study:
- To propose and numerically investigate a broadband silicon optical modulator integrated with a graphene plasmonic waveguide.
- To explore the optical characteristics of the proposed modulator at a wavelength of 1.55 μm.
Main Methods:
- Numerical investigation of optical characteristics.
- Utilizing graphene's surface plasmon polariton absorption.
- Electrically tuning graphene's refractive index to modify waveguide properties.
Main Results:
- The hybrid plasmonic waveguide supports a strongly confined, highly lossy hybrid long-range surface plasmon polariton strip mode.
- Achieved an on/off extinction ratio greater than 13.7 dB across the entire C-band (1.530–1.565 μm).
- Demonstrated significant power attenuation of light propagating along the waveguide.
Conclusions:
- The graphene-integrated hybrid plasmonic waveguide modulator shows promise for broadband operation.
- This technology could be crucial for developing advanced graphene-silicon waveguide-based integrated photonic devices.
