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A Novel Design of High-Quality 18-Channels Demultiplexer Based on Resonance Nanocavities

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Abstract

In this study, the design and simulation of an 18-channel demultiplexer based on resonant cavities in 2D photonic crystals is proposed. The lattice shape of silicon rods used in this structure is square. To have a reasonable percent transmittance from the input waveguide to resonant cavities, we have used point and linear defects, changing the radius of resonant cavities and adjusting the distance of the dielectric rods around the cavities. The main work of choosing the wavelength is performed by the resonant cavities. Due to a large number of output channels and long distances of the waveguides, the power reflector is used to compensate for the power losses in the waveguide path. The amount of the proposed structure’s percentage transmittance is between 90 and 100% and the quality factor is 5383 in the best case. The least bandwidth of the output signal spectra is 0.29 nm, and the amount of crosstalk between the output channels is from − 10 to − 62 dB. The overall dimensions of the proposed structure are 1069µm2. One of the essential applications of the proposed demultiplexer structure is in WDM communication systems.

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Authors and Affiliations

  1. School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, China

    Mojtaba Hosseinzadeh Sani

  2. Department of Electrical Engineering, Imam Reza International University, Mashhad, Iran

    Saeed Khosroabadi

Authors
  1. Mojtaba Hosseinzadeh Sani
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  2. Saeed Khosroabadi
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Contributions

All the works in this paper (study conception and design, material preparation, data collection and analysis) have been done together by Mojtaba Hosseinzadeh Sani and Saeed Khosroabadi. All authors read and approved the final manuscript.

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Correspondence to Saeed Khosroabadi.

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Sani, M.H., Khosroabadi, S. A Novel Design of High-Quality 18-Channels Demultiplexer Based on Resonance Nanocavities. Plasmonics 17, 1403–1410 (2022). https://doi.org/10.1007/s11468-022-01623-w

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  • DOI: https://doi.org/10.1007/s11468-022-01623-w

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