研究目的
Designing an all-optical switch based on plasmonic metal–insulator–metal (MIM) waveguides and Mach–Zehnder (MZ) interferometer for potential applications in integrated optical circuits.
研究成果
The proposed plasmonic MZ structure demonstrates high-contrast switching in an ultra-subwavelength gap size, with better tunability in asymmetric geometries. The device's simple design and low threshold pump beam intensity suggest potential applications in nano-optical integrated circuits.
研究不足
The study is limited by the computational resources and the accuracy of the FEM simulations. The practical implementation may face challenges in fabrication and integration into existing optical circuits.
1：Experimental Design and Method Selection:
The study employs a finite element method (FEM) with a refined triangle mesh for simulations to design an all-optical switch based on plasmonic MIM waveguides and MZ interferometer. A nonlinear material with intensity-dependent refractive index is introduced in one arm for active switching.
2：Sample Selection and Data Sources:
Silver is selected as the metal part with air as the dielectric. Ag-BaO is chosen for the Kerr nonlinear material in one arm.
3：List of Experimental Equipment and Materials:
The study uses FEM simulations with specific parameters for the metal (silver) and dielectric (air), and a Kerr nonlinear material (Ag-BaO).
4：Experimental Procedures and Operational Workflow:
The transmission of the switch in ON and OFF states is analyzed versus wavelength and geometrical parameters. The effect of arm thickness and gap size on the device's performance is investigated.
5：Data Analysis Methods:
The study analyzes the transmission spectra and geometrical dispersion to evaluate the switch's performance and tunability.
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