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Optical polarization driven giant relief modulation in amorphous chalcogenide glasses.
K E Asatryan1, T Galstian, R Vallée
1Centre for Optics, Photonics and Lasers, Laval University, Quebec, Canada G1K 7P4.
Physical Review Letters
|March 24, 2005
Summary
Giant relief modulation was observed in amorphous arsenic sulfide (As2S3) glass due to photoinduced mass transport. This phenomenon occurs even with low-intensity, uniform light, suggesting a novel light-matter interaction mechanism.
Area of Science:
- Materials Science
- Optics
- Solid State Physics
Background:
- Amorphous chalcogenide glasses exhibit unique photoresponsive properties.
- Light-induced structural changes are crucial for optical device applications.
Purpose of the Study:
- To investigate giant relief modulation in amorphous As2S3 glass.
- To understand the mechanism behind photoinduced mass transport under specific illumination conditions.
Main Methods:
- Observation of relief modulation using polarization-modulated near band gap light.
- Analysis of periodic modulations induced by low-intensity, uniform light illumination.
Main Results:
- Giant relief modulation was successfully observed in amorphous As2S3 glass.
- Periodic modulations were attributed to photoinduced mass transport.
- The effect was observed despite low and uniform light intensity.
Conclusions:
- Photoinduced mass transport is a key mechanism for relief modulation in As2S3 glass.
- A phenomenological model involving photoinduced alignment of anisotropic microvolumes explains the observed phenomenon.