Design and analysis of 2D photonic crystal based DEMUX using Y-shaped junction
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D.T. Hemanth Kumar
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B.S. Rohini
Abstract
Lithium niobate with its electro-optic properties is used as dielectric rods arranged in a 15 × 13 square lattice within an air medium to simulate and develop a two-dimensional optical demultiplexer (DEMUX) based on photonic crystals (PhCs). To steer light, a Y-shaped line defect is added, which serves as a 1 × 2 DEMUX. Using an eigenfrequency-based analysis, the structure’s photonic bandgap (PBG) is determined to be a bandgap between the first and second bands in the frequency range of 2.1188 × 1014 Hz to 2.4604 × 1014 Hz. A wave optics model is used to study the transmission characteristics in the 1.55 µm–1.60 µm operational wavelength range. Effective input and output light routes are made possible by the inclusion of line defect faults. The finite element method (FEM) is used to generate field profiles, and S-parameter analysis sheds light on power flow and signal behavior at various ports. Electric (E) and magnetic (H) field distributions are recovered by periodic port analysis; resonances are detected at 1.5359 µm with peak transmissions of 0.49 achieving 50 % and quality factors of 1,097, respectively. The design is appropriate for wavelength-selective switching applications like splitters and all-optical switches in elastic optical networks (EONs) due to its low crosstalk, low reflection, and efficient wavelength separation.
Funding source: Department of Science and Technology-Science and Engineering Research Board (SERB),India
Award Identifier / Grant number: EEQ/2023/000202
Acknowledgment
This work is sponsored by DST-SERB (EEQ/2023/000202) project titled as “Design and Performance Evaluation of Photonic-Crystal Based Elastic Optical Switches for Next Generation Optical Networks”. COMSOL Software is supported under I-Stem Software Support.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: The author(s) have (has) accepted responsibility for the entire content of this manuscript and approved its submission.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: The author(s) state (s) no conflict of interest.
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Research funding: This work is sponsored by DST-SERB (EEQ/2023/000202) project titled as “Design and Performance Evaluation of Photonic-Crystal Based Elastic Optical Switches for Next Generation Optical Networks.
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Data availability: Not applicable.
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