Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 5, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3614432
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- European Union [TAMOP 4.2.1./B-09/1/KONV-2010-007]
- European Social Fund
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Surface relief gratings formation in amorphous selenium thin films in two recording configurations with light intensity modulation were studied in situ by real-time atomic force microscopy and diffraction efficiency measurements. We report observation of mass transport effect in films induced by band-gap irradiation when the light polarization of the recording beams has a component along the light intensity gradient (p-p scheme of recording) that allows obtaining giant stable gratings in this versatile chalcogenide material. On the contrary, only a pure scalar weak grating caused by photoinduced volume shrinkage is obtained in the s-s recording configuration, even for long-term irradiation. (C) 2011 American Institute of Physics. [doi:10.1063/1.3614432]
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