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Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

Published on: May 15, 2017

Laser-induced local heating of multilayers.

M Mansuripur¹, G A Connell, J W Goodman

¹Xerox Corporation, Palo Alto Research Center, 3333 Coyote Hill Road, Palo Alto, California 94304, USA.

|April 15, 2010

Summary

This study analyzes laser-induced heat in multilayer structures, focusing on optical absorption and thermal diffusion. Results show temperature profiles for magneto-optical disk recording, applicable to thermal marking and laser annealing.

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Area of Science:

Materials Science
Optical Engineering
Thermal Physics

Background:

Multilayer structures are crucial in various optical and data storage applications.
Understanding laser-material interactions is key for developing advanced technologies.

Purpose of the Study:

To investigate optical energy absorption and heat diffusion in multilayer structures under laser illumination.
To present a methodology for analyzing thermal effects during laser-based processes.

Main Methods:

Development of analytical and numerical procedures to model heat transfer.
Simulation of temperature distribution profiles.

Main Results:

Detailed analysis of optical absorption and subsequent thermal diffusion.

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Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

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Presentation of specific temperature distribution profiles for magneto-optical disk recording.

Conclusions:

The presented technique effectively models laser-induced thermal phenomena in multilayer systems.
This approach is valuable for optimizing processes like thermal marking and laser annealing.