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Published on: May 18, 2015
Hybrid finite-element/rigorous coupled wave analysis for scattering from three-dimensional doubly periodic structures
1ElectroScience Laboratory, Department of Electrical and Computer Engineering, The Ohio State University, Columbus, Ohio 43212, USA. kuloglu.1@osu.edu
Summary
A novel hybrid method models electromagnetic waves interacting with doubly periodic structures. This approach efficiently handles complex material variations and reduces computational mesh dimensions for accurate analysis.
Area of Science:
- Electromagnetics and Computational Physics
Background:
- Modeling electromagnetic wave interactions with periodic structures is crucial in various scientific fields.
- Existing methods may face limitations with complex material variations and dimensional reduction.
Purpose of the Study:
- To introduce a new hybrid finite-element/rigorous coupled wave analysis (FE/RCWA) formulation.
- To enable accurate modeling of electromagnetic wave interactions with doubly periodic structures of finite extent.
Main Methods:
- Utilizing a hybrid finite-element and rigorous coupled wave analysis approach.
- Applying Fourier series expansion and Floquet's theory to one periodic dimension for mesh reduction.
- Handling arbitrary variations in material properties within the unit cell.
Main Results:
- The proposed model effectively simulates electromagnetic wave interactions with doubly periodic structures.
- The method demonstrates capability in managing complex, spatially varying material properties.
- Dimensionality reduction is achieved through the integration of Fourier series and Floquet's theory.
Conclusions:
- The developed FE/RCWA formulation provides a powerful tool for analyzing doubly periodic structures.
- The method offers an efficient and accurate approach for electromagnetic simulations with complex materials.
- Validation against alternative methods confirms the proposed model's reliability.
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