研究目的
Designing and numerically analyzing an all-optical logic gates in the terahertz regime using a simple structure composed of four graphene waveguides and a cavity resonator to realize XOR, XNOR, and NOT gates with high contrast ratio between logical “ON” and “OFF” states.
研究成果
The proposed simple structure based on graphene nanoribbon can effectively realize all-optical logic gates in the terahertz regime with high contrast ratios between logical states, opening new avenues for designing graphene-based integrated circuits.
研究不足
The study is limited to numerical simulations and does not include experimental validation. The practical implementation of the proposed structure may face challenges related to fabrication precision and integration with existing optical systems.
1：Experimental Design and Method Selection:
The study employs a 3D finite-difference time-domain (FDTD) method for numerical simulations to investigate the propagation performance of the proposed structure.
2：Sample Selection and Data Sources:
The structure is composed of four graphene waveguides and a cavity resonator on a silicon substrate.
3：List of Experimental Equipment and Materials:
Graphene nanoribbons deposited on silicon substrate.
4：Experimental Procedures and Operational Workflow:
Maxwell equations are solved numerically using the 3D FDTD method with a grid size of 2 nm × 2 nm × 2 nm. Independent mode sources are set up in each port to excite THz waves separately.
5：Data Analysis Methods:
Transmission spectra are calculated to investigate the propagation performance, and the contrast ratio between logical “ON” and “OFF” states is estimated.
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