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Optical Logic Gates Based on Z-Shaped Silicon Waveguides at 1.55 μm
Amer Kotb1,2, Kyriakos E Zoiros3, Antonios Hatziefremidis4
1GPL Photonics Laboratory, State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Micromachines
|June 28, 2023
Summary
Researchers developed all-optical logic gates (AOLGs) using silicon photonics. These Z-shaped waveguide devices operate at 120 Gb/s, offering improved performance for future lightwave circuits.
Area of Science:
- Photonics
- Optical Computing
- Silicon Photonics
Background:
- Silicon photonics has advanced significantly in device functionality and integration for communication, sensing, and information processing.
- All-optical logic gates (AOLGs) are crucial for high-speed lightwave circuits.
Purpose of the Study:
- To theoretically demonstrate a complete family of all-optical logic gates (AOLGs) using silicon-on-silica waveguides.
- To achieve high-speed operation and improved performance metrics for AOLGs.
Main Methods:
- Finite-difference-time-domain (FDTD) simulations were employed.
- A novel Z-shaped waveguide design in silicon-on-silica was utilized.
- The operational principle is based on optical beam interference (constructive and destructive).
Main Results:
- A full suite of AOLGs (XOR, AND, OR, NOT, NOR, NAND, XNOR) was theoretically demonstrated.
- The proposed design achieves high-speed operation at 120 Gb/s.
- Improved contrast ratios (CRs) were observed compared to existing designs.
Conclusions:
- The proposed compact silicon-on-silica waveguide can realize high-performance AOLGs.
- This design offers a cost-effective solution for advanced lightwave circuits.
- The developed AOLGs meet current and future demands for integrated optical systems.
