研究目的
Investigating the design and performance of vertical directional couplers based on surface plasmon polariton waveguides for integration from micro-scale to nano-scale.
研究成果
The SPP IMIMI and MIM VDCs proposed in the study can function as basic devices for plasmon-based nano-integrated circuits, representing a potential step in the integration of devices from the micro- to the nano-scale. The output characteristics of both VDCs can be controlled by changing the length of the straight waveguide, making them useful for applications such as signal splitters or switching devices.
研究不足
The study is limited to simulation-based analysis and does not include experimental validation. The practical fabrication and integration of the proposed VDCs may present challenges not addressed in the simulation.
1：Experimental Design and Method Selection:
The study involves the design and simulation of two types of vertical directional couplers (VDCs) based on surface plasmon polariton (SPP) waveguides: an SPP insulator-metal-insulator-metal-insulator (IMIMI) VDC and an SPP metal-insulator-metal (MIM) VDC. The FDTD simulation method was used for analysis.
2：Sample Selection and Data Sources:
The study uses Au as the metal and a low-loss polymer as the insulator in the IMIMI and MIM waveguides. The input sources are TM mode waves with a wavelength of 1550 nm.
3：List of Experimental Equipment and Materials:
The simulation was performed using FDTD solutions from Lumerical, Inc. The materials used include Au and a low-loss polymer.
4：Experimental Procedures and Operational Workflow:
The study involves simulating the SPP IMIMI and MIM VDCs as functions of the length of the straight double waveguide, the width of the SPP waveguides, and the length of the C-gap.
5：Data Analysis Methods:
The output intensities were simulated as a function of the length of the straight double waveguide to calculate the ratio between output 1 and output 2.
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