研究目的
Design and analysis of a plasmonic demultiplexer based on band-stop filters using double-nanodisk-shaped resonators.
研究成果
The proposed structure not only has the highest maximum quality factor, but also each channel has a good maximum transmittance in comparison with the other reported structures. The proposed structure is easy to fabricate and it has the potential for use in all-optical ultra-compact circuits and devices.
研究不足
The transmission peaks are limited by the internal parasitic loss of metal in the nanocavities at the desired resonance wavelengths.
1：Experimental Design and Method Selection:
The structure is numerically simulated using the finite difference time domain (FDTD) method with the perfectly matched layer (PML) absorbing boundary conditions.
2：Sample Selection and Data Sources:
The dielectric and metal layers are air (εd = 1) and silver, respectively. The dielectric constant of the metal silver is characterized by the Drude model.
3：List of Experimental Equipment and Materials:
A TM polarized Gaussian pulse (wavelength range of 500–1000 nm) propagates from the left port to the right port (along the x-direction).
4：Experimental Procedures and Operational Workflow:
The source is located at a horizontal distance of 500 nm from the center of MIM waveguide. Two power monitors are set at the positions of Pin and Pout to detect the input power at the input port and the transmitted power at the output port.
5：Data Analysis Methods:
The transmission spectrum is calculated as T = Pout/Pin.
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