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Elimination of spurious modes in full-vectorial finite element method based acoustic modal solution

Gulistan, A., Rahman, M. M., Ghosh, S. ORCID: 0000-0002-1992-2289 & Rahman, B. M. ORCID: 0000-0001-6384-0961 (2019). Elimination of spurious modes in full-vectorial finite element method based acoustic modal solution. Optics Express, 27(8), pp. 10900-10911. doi: 10.1364/OE.27.010900


Finite element method is a powerful technique for solving a wide range of engineering problems. However, the existence of the spurious solutions in full-vectorial finite element method has been a major problem for both acoustic and optic modal analyses. For emerging photonic devices exploiting light-sound interactions in high index contrast waveguides, this problem is a major limitation. A penalty function is introduced to remove these unwanted spurious modes in acoustic waveguides, which also identifies the acoustic modes more easily. Numerically simulated results also show considerably improved vector mode profiles. The proposed penalty method has been applied for the characterization of low index contrast single mode fiber and also for high index contrast silicon nanowire to demonstrate its effectiveness.

Publication Type: Article
Additional Information: © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Departments: School of Science & Technology > Engineering
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