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Ultra-compact all-optical plasmonic switch for three telecommunication windows using a nonlinear Kerr material and
Applied Optics
|September 14, 2023
Summary
An all-optical plasmonic switch using nonlinear Kerr material and Fano resonance enables switching at three telecommunication wavelengths. This ultra-compact device is ideal for integrated photonic circuits.
Area of Science:
- Photonics
- Nanotechnology
- Optical Engineering
Background:
- All-optical switches are crucial for high-speed optical communication networks.
- Metal-insulator-metal (MIM) waveguides offer compact plasmonic device designs.
- Nonlinear optical effects are key to achieving all-optical switching functionalities.
Purpose of the Study:
- To propose and analyze a novel all-optical plasmonic switch.
- To achieve broadband switching operation at three telecommunication wavelengths (850, 1310, and 1550 nm).
- To leverage Fano resonance for efficient switching states.
Main Methods:
- Theoretical analysis using the transmission-line model (TLM).
- Numerical simulations using the finite difference time domain (FDTD) method.
- Design based on a MIM waveguide coupled to perpendicular rectangular cavities filled with nonlinear Kerr material.
Main Results:
- Demonstrated successful all-optical switching operation at 850, 1310, and 1550 nm.
- Utilized Fano resonance to create a band-stop region for effective OFF states at 1310 and 1550 nm.
- Achieved good agreement between theoretical (TLM) and numerical (FDTD) results.
Conclusions:
- The proposed ultra-compact all-optical plasmonic switch is effective for broadband operation.
- The device utilizes nonlinear cross-phase modulation (XPM) and Fano resonance for switching.
- This switch holds significant potential for applications in photonic integrated circuits (PICs).
