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Design of a Double-Mode Plasmonic Wavelength Filter Using a Defective Circular Nano-Disk Resonator Coupled to Two MIM Waveguides

By Imane Zegaar, Abdesselam Hocini, Ahlam Harhouz, Djamel Khedrouche, and Hocine Bensalah
Progress In Electromagnetics Research Letters, Vol. 104, 67-75, 2022


Various resonance modes, high transmission, and quality factor with simple design are highly desirable parameters for realizing nano-integrated plasmonic devices. In the context, a plasmonic structure consisting of two straight waveguides MIM coupled one central defective circular nano-disk resonator (CNDR) is proposed in this work. The insulator and metal of the proposed plasmonic filter are air and silver, respectively. The plasmonic filter is designed and investigated numerically by using the finite difference time domain method (FDTD). Our simulation results indicate that the proposed plasmonic filter has two transmission peaks with a maximum transmission equal to 80 and 70 percent. The advantages of the proposed filter are the various resonance modes with high transmission peaks and high quality factor which reaches 35.27. In view of these features, our proposed structure of plasmonic filter has the potential to be employed in various devices such as plasmonic demultiplexers and sensors for optical communication purposes.


Imane Zegaar, Abdesselam Hocini, Ahlam Harhouz, Djamel Khedrouche, and Hocine Bensalah, "Design of a Double-Mode Plasmonic Wavelength Filter Using a Defective Circular Nano-Disk Resonator Coupled to Two MIM Waveguides," Progress In Electromagnetics Research Letters, Vol. 104, 67-75, 2022.


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