Abstract
This paper presents a 4-channel demultiplexer totally based on a two-dimensional photonic crystal with silicon air holes and defects with the advent of a graphene sheet, in multiplexing systems that use Dense Wavelength Division Multiplexing. Methods that incorporate Plane Wave Expansion and finite difference time domain are used, as they have significant efficiency to generate the photonic hollow modes of the demultiplexer and analyze the global distribution and transmission, respectively. Parameters of transmission overall performance, maximum quality factor, spectral width, crosstalk, and channel spacing of the demultiplexer are very important statistics to confirm the overall performance of the device, whose values are about 92%, 1944.3, 0.9 nm, − 60 dB and 0.1 nm, respectively, whose consequences are problem to the validation of the requirements of the Dense Wavelength Division Multiplexing device (ITU.G.694.1). The proposed demultiplexer includes a bus or linear waveguide with graphene to guide the slight wave and 4 resonant cavities wherein graphene is placed withinside the center to select out the wavelength in a hexagonal lattice form of dielectric air holes in air. The bus waveguide transmits slight into the resonant hole area and exits through the respective falling waveguide.
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Acknowledgements
This study was financed in part by the Coordination for the Improvement of Higher Education Personnel—Brazil (CAPES)—Finance Code 001.
To the Dean of Research and Graduate Studies (PROPESP) of the Federal University of Para (UFPA), Belém—Brazil.
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Simone Cristina Costa Tavares Contributed to the development of research and results; Fabio Barros de Sousa, Lelis Araujo de Oliveira, Fiterlinge Martins de Sousa, Igor Ramon Sinimbú Miranda Contributed to figures and tables; and Marcos B. C. Costa Contributed to the analysis of results and guidance of the paper.
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da Costa Tavares, S.C., de Sousa, F.B., de Oliveira, L.A. et al. Four-channel photonic crystal demultiplexer with graphene with high quality factor for DWDM applications. Opt Quant Electron 56, 622 (2024). https://doi.org/10.1007/s11082-024-06293-y
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DOI: https://doi.org/10.1007/s11082-024-06293-y