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Laser Thermochemical High-Contrast Recording on Thin Metal Films
Elena A Shakhno1,2, Quang D Nguyen1, Dmitry A Sinev1,2
1Faculty of Laser Photonics and Optoelectronics, ITMO University, 197101 Saint Petersburg, Russia.
Nanomaterials (Basel, Switzerland)
|January 5, 2021
Summary
Researchers developed a model for laser-induced oxide formation on titanium films, achieving 90% contrast structures for photonics. This method accurately predicts optical properties, enabling applications in optical converters.
Area of Science:
- Materials Science
- Optics
- Nanotechnology
Background:
- Laser-induced thermochemical recording is vital for photonics.
- The link between laser parameters and oxide structure properties remains unclear.
Purpose of the Study:
- To investigate direct laser interference patterning of titanium (Ti) films in an oxidative environment.
- To establish a theoretical model for oxide formation dynamics and optical properties.
Main Methods:
- Direct laser interference patterning of Ti films.
- Development of a theoretical model based on Wagner oxidation law.
- Analysis of optical properties of oxide-metal-glass systems.
Main Results:
- Submicron periodical structures with up to 90% contrast in the visible range were formed.
- A theoretical model accurately predicted experimental results (10% accuracy).
- The model's applicability was extended to other metals like Zr, Hf, V, Nb, and Ta.
Conclusions:
- Precise laser parameter selection is crucial for nonlinear optical, thermal, and chemical processes.
- The developed model enables prediction of optical characteristics for laser-induced oxidation.
- Results show promise for the photonics industry, particularly for optical converters.
