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<p>Surface plasmon polaritons (SPPs) are electromagnetic waves that have the ability to propagate at metal-dielectric interfaces. Optical devices based on SPPs have been designed and studied extensively due to their remarkable properties such as overcoming the diffraction limit and manipulating light at subwavelength scale high speed in small structures. A 1 × 2 optical demultiplexer in a plasmonic nanostructure was constructed using the Finite Element Method (FEM) to investigate the proposed structures numerically using COMSOL Multiphysics 5.6 software. The structure consists of two horizontally arranged three-notches circular resonators, using silver and air as metals and dielectrics respectively. The dimensions are 1000&#xa0;nm × 1250&#xa0;nm, and it operates in a wavelength channel of 1220 and 1680&#xa0;nm respectively. The results obtained from the proposed demultiplexers devices with a Full-Width Half-Maximum (FWHM) of 20&#xa0;nm have a Quality Factor (Q-Factor) of 61 at a wavelength response of 1220&#xa0;nm, and a second channel with a Q-Factor of 88.4. Due to the compatible sizes of the proposed Demultiplexers devices, they can be used in integrated circuits for optical communication.</p>

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New design of 1 × 2 demultiplexer with high-quality factor based on MIM plasmonic waveguides

  • 期刊论文

  • 发表日期：

    2025年2月24日

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  • Karrar A. Kzar,
  • Ahmed Ghanim Wadday,
  • Sinan M. Abdulsatar

摘要

Surface plasmon polaritons (SPPs) are electromagnetic waves that have the ability to propagate at metal-dielectric interfaces. Optical devices based on SPPs have been designed and studied extensively due to their remarkable properties such as overcoming the diffraction limit and manipulating light at subwavelength scale high speed in small structures. A 1 × 2 optical demultiplexer in a plasmonic nanostructure was constructed using the Finite Element Method (FEM) to investigate the proposed structures numerically using COMSOL Multiphysics 5.6 software. The structure consists of two horizontally arranged three-notches circular resonators, using silver and air as metals and dielectrics respectively. The dimensions are 1000 nm × 1250 nm, and it operates in a wavelength channel of 1220 and 1680 nm respectively. The results obtained from the proposed demultiplexers devices with a Full-Width Half-Maximum (FWHM) of 20 nm have a Quality Factor (Q-Factor) of 61 at a wavelength response of 1220 nm, and a second channel with a Q-Factor of 88.4. Due to the compatible sizes of the proposed Demultiplexers devices, they can be used in integrated circuits for optical communication.