Scattering of light from arbitrarily oriented finite cylinders
L D Cohen1, R D Haracz, A Cohen
1Drexel University, Department of Physics & Atmospheric Science, Philadelphia, Pennsylvania 19104, USA.
Applied Optics
|March 1, 1983
Summary
An iterative light scattering method accurately models finite dielectric cylinders, even with small aspect ratios. This approach converges quickly, providing reliable results for arbitrarily oriented, finite-sized objects.
Area of Science:
- Electromagnetics and Optics
- Computational Physics
- Materials Science
Background:
- Light scattering analysis is crucial for understanding electromagnetic wave interactions with matter.
- Previous models often assumed infinite cylinders, limiting their applicability to real-world finite objects.
- Iterative methods offer potential for more accurate modeling of complex scattering phenomena.
Purpose of the Study:
- To apply and validate an iterative light scattering approach for finite dielectric cylinders.
- To assess the convergence and accuracy of the iterative method for various cylinder orientations and aspect ratios.
- To quantify the effects of finite size on light scattering compared to infinite cylinder approximations.
Main Methods:
- Utilized an iterative scattering approach based on Shifrin and Acquista's work.
- Applied the method to dielectric cylinders with phase shifts less than 2 and arbitrary orientations.
- Calculated and analyzed the first two orders of iteration for convergence.
- Compared results against exact solutions for infinite cylinders.
Main Results:
- The iterative method demonstrated rapid convergence, achieving 1% accuracy with the first two orders.
- Convergence was maintained even for cylinders with aspect ratios as low as 20.
- Significant differences were observed between finite and infinite cylinder scattering predictions.
- The study quantified the impact of finite dimensions on scattering patterns.
Conclusions:
- The iterative approach is effective for modeling light scattering from finite dielectric cylinders.
- The method shows excellent convergence properties, making it computationally efficient.
- Finite size effects are significant and must be considered for accurate scattering predictions.
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