Composite scattering characteristics analysis of micro-ellipsoidal periodic structure optical surface and...

Area of Science:

• Optics and Photonics
• Materials Science
• Computational Electromagnetics

Background:

• Accurate detection of micro-nano periodic optical surfaces is crucial for advanced applications.
• Composite scattering from surface structures and defects presents a significant challenge.
• Existing methods may lack efficiency or accuracy in complex scenarios.

Purpose of the Study:

• To develop and validate a model for analyzing composite scattering from micro-ellipsoidal periodic surfaces with pore defects.
• To investigate the influence of structural and defect parameters on scattering characteristics.
• To provide a method for accurate and efficient adjustment and detection of optical surfaces.

Main Methods:

• Utilized the multi-resolution time-domain (MRTD) approach to establish a calculation model.
• Developed a model for the intensity distribution of composite scattering.
• Validated results against CST Microwave Studio and the finite-difference time-domain (FDTD) method.

Main Results:

• The MRTD calculation model accurately predicted composite scattering intensity.
• Results showed good agreement with established simulation software (CST Microwave Studio) and FDTD.
• Numerical analysis revealed the impact of roughness, unit structure, defect size, and depth on scattering.

Conclusions:

• The proposed MRTD method is effective for analyzing composite scattering from micro-nano periodic optical surfaces with defects.
• The study provides insights into parameter influences for functional surface design and metamaterial optical systems.
• This research supports advancements in ultrasensitive detection, scattering control, and frequency selection.