SPARSE (spatially phase-retarded spectroscopic ellipsometry) for real-time film analysis

Area of Science:

• Materials Science
• Optical Physics
• Spectroscopy

Background:

• Traditional spectroscopic ellipsometry relies on temporal polarization changes.
• Characterizing thin film structures often requires complex and time-consuming measurements.

Purpose of the Study:

• To propose and validate a novel spectroscopic ellipsometer, spatially phase-retarded spectroscopic ellipsometry (SPARSE).
• To enable real-time characterization of film structures with a single image acquisition.

Main Methods:

• Development of a new spectroscopic ellipsometer utilizing spatial polarization distribution.
• Experimental verification using certified reference materials (single-layered) and multi-layered film specimens.

Main Results:

• SPARSE collects all necessary information for film structure characterization in a single image.
• The technique facilitates real-time measurement capabilities, significantly improving efficiency.

Conclusions:

• SPARSE represents a significant advancement in spectroscopic ellipsometry.
• The method offers a faster and more efficient approach to thin film analysis and characterization.