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All-optical logic gates based on three-dimensional asymmetry modulation: from coherent absorption to dynamic key
Optics Express
|June 14, 2025
Summary
This study introduces novel all-optical logic gates using reconfigurable metamaterials. These devices offer multiple-input-output capabilities for advanced optical computing and secure encrypted communication.
Area of Science:
- Photonics and Metamaterials
- Optical Computing
- Information Security
Background:
- Existing all-optical logic gates often use single-input-output operations, limiting device functionality.
- Metamaterials offer unique optical properties for advanced device design.
Purpose of the Study:
- To propose a novel stack-based reconfigurable split ring resonator (SRR) metamaterial structure for all-optical logic gates.
- To demonstrate multiple-input-output (MIO) capabilities for enhanced optical signal processing and encryption.
Main Methods:
- Designing a stack-based SRR metamaterial structure to excite Fano resonance at 1.55 μm.
- Utilizing coherent perfect absorption (CPA) for high output modulation.
- Implementing MIO features by combining asymmetry and phase-difference modulation.
Main Results:
- Achieved nearly 100% output modulation capability.
- Demonstrated high-contrast XOR, OR, and AND logic functions.
- Developed a dynamic key mapping (DKM) encryption scheme leveraging MIO properties.
Conclusions:
- The proposed MIO all-optical logic gates overcome SIO limitations, enabling versatile optical computing.
- The DKM encryption scheme offers a novel approach to secure communication, surpassing traditional methods.
- This work opens new avenues for digitized metasurface optical computing and information security.
