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Silicon graphene waveguide tunable broadband microwave photonics phase shifter
Optics Express
|April 11, 2014
Summary
We developed a tunable broadband microwave photonics phase shifter using silicon graphene waveguides. This device achieves a full 360° radiofrequency phase-shift over 40 GHz bandwidth with low voltage.
Area of Science:
- Photonics
- Materials Science
- Electrical Engineering
Background:
- Microwave photonics enables advanced signal processing.
- Integrated photonic devices offer miniaturization and scalability.
- Tunable phase shifters are crucial components in various microwave systems.
Purpose of the Study:
- To propose and numerically validate a novel tunable broadband microwave photonics phase shifter.
- To utilize silicon graphene waveguides for enhanced device performance.
- To demonstrate a phase shifter capable of full 360° radiofrequency phase-shift over a wide bandwidth.
Main Methods:
- Design and simulation of a phase shifter based on integrated ring cavities.
- Utilizing silicon graphene waveguides as the active material.
- Numerical computation to assess performance metrics like bandwidth and phase-shift.
Main Results:
- Demonstrated feasibility for broadband operation exceeding 40 GHz bandwidth.
- Achieved a full 360° radiofrequency phase-shift.
- Required only a modest voltage excursion of 0.12 V for operation.
Conclusions:
- Silicon graphene waveguides are a promising platform for integrated microwave photonics.
- The proposed device offers efficient and broadband phase shifting capabilities.
- This technology has potential applications in advanced microwave and millimeter-wave systems.
