SPDFEM: Simulation of Photonic Devices using Finite Element Method

SPDFEM is a powerful Python package for simulating and analyzing photonic devices using the Finite Element Method. It provides a robust framework for modeling electromagnetic wave propagation, light-matter interactions, and optical phenomena in complex photonic structures.

🚀 Features

• Full electromagnetic field simulation using FEM
• Support for complex geometries and material properties
• Built-in mesh generation and handling
• Visualization tools for field distributions
• Comprehensive validation and verification framework
• Easy-to-use interface for defining simulation parameters
• Extensive documentation and tutorials

📋 Prerequisites

• Linux Operating System
• Python 3.7 or higher
• FEniCS 2019.1.0
• Additional Python packages:

  matplotlib
  numpy
  scipy
  pytest (for running tests)
  

🔧 Installation

1. Clone the repository:

   git clone https://github.com/yourusername/SPDFEM.git
   cd SPDFEM

2. Install required dependencies:

   pip install -r requirements.txt

🎯 Quick Start

1. Navigate to the src directory:

   cd src

2. Run the main simulation:

   python main.py

3. Follow the interactive prompts to:

   • Specify input file path (e.g., Input/Input_t1.txt)
   • Provide mesh file path (e.g., Mesh/G_fill_t1.xml)
   • Define physical regions file (e.g., Mesh/G_fill_pr_t1.xml)
   • Set facet regions file (e.g., Mesh/G_fill_fc_t1.xml)

4. Results will be saved in the FEM Output directory as .pvd and .vtk files.

📚 Documentation

• Problem Statement - Detailed explanation of the physical problem
• System Requirements Specification - Technical requirements and theoretical background
• Validation & Verification Plan - Testing methodology
• V&V Report - Validation results and analysis
• Design Documentation - Software architecture and modular design
• Tutorial Notebook - Step-by-step guide for beginners

🧪 Testing

Run the test suite using pytest:

pytest src/test_*.py

Key test files:

• test_constparam.py: Validates constant parameters
• test_inputparam.py: Tests input parameter handling
• test_visual_ls.py: Verifies visualization functions
• test_meshinput.py: Ensures proper mesh handling

📁 Project Structure

SPDFEM/
├── src/                 # Source code
│   ├── main.py         # Main simulation entry point
│   ├── fem_solver.py   # FEM implementation
│   ├── inputparam.py   # Parameter handling
│   └── ...
├── docs/               # Documentation
├── Mesh/              # Example mesh files
├── Input/             # Input configuration files
└── FEM Output/        # Simulation results

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request. For major changes, please open an issue first to discuss what you would like to change.

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

📧 Contact

For questions, issues, or collaboration opportunities, please open an issue or contact the repository maintainers.

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Happy simulating with SPDFEM! 🌟