{"id":369138,"date":"2024-05-29T20:48:30","date_gmt":"2024-05-29T20:48:30","guid":{"rendered":"\/forum\/forums\/topic\/modal-analysis-_finding-single-mode-waveguide-field-components\/"},"modified":"2024-05-29T20:48:30","modified_gmt":"2024-05-29T20:48:30","slug":"modal-analysis-_finding-single-mode-waveguide-field-components","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/modal-analysis-_finding-single-mode-waveguide-field-components\/","title":{"rendered":"Modal analysis _finding single mode waveguide field components"},"content":{"rendered":"<p>I am performing modal analysis using the Lumerical FDE solver on a rib waveguide structure (Z-cut LN) with the propagation direction along the y-axis. I am interested in finding a single-mode waveguide structure, and for this purpose, I am obtaining a 95% TE polarization fraction (Ex) for mode 1. However, for the same mode, when I observe Ey and Ez, the intensity of Ey is larger than that of Ez. Since the propagation direction is along y, Ey should be negligible or of the lowest intensity. Please provide comments, possible solutions, and opinions on this matter.<\/p>\n<p>Thank you,<\/p>\n<p>Mijan<span style=\"font-size: 14pt\"><img decoding=\"async\" title=\"Ez\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/05\/29-05-2024-1717015492-Ez (2).jpg\" alt=\"\"><\/span><\/p>\n","protected":false},"template":"","class_list":["post-369138","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I am performing modal analysis using the Lumerical FDE solver on a rib waveguide structure (Z-cut LN) with the propagation direction along the y-axis. I am interested in finding a single-mode waveguide structure, and for this purpose, I am obtaining a 95% TE polarization fraction (Ex) for mode 1. However, for the same mode, when\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/modal-analysis-_finding-single-mode-waveguide-field-components\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Modal analysis _finding single mode waveguide field components | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"I am performing modal analysis using the Lumerical FDE solver on a rib waveguide structure (Z-cut LN) with the propagation direction along the y-axis. I am interested in finding a single-mode waveguide structure, and for this purpose, I am obtaining a 95% TE polarization fraction (Ex) for mode 1. 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