Paper
25 January 2007 Sub-bandgap light hologram recording in amorphous chalcogenides
Andris Ozols, Dmitry Saharov
Author Affiliations +
Proceedings Volume 6596, Advanced Optical Materials, Technologies, and Devices; 65961C (2007) https://doi.org/10.1117/12.726508
Event: Advanced Optical Materials, Technologies, and Devices, 2006, Vilnius, Lithuania
Abstract
Sub-bandgap light recording (SBLR) of holograms is studied basing on the experiments in a-As2S3 films and literature data. Holographic grating recording with focused (light intensity I = 14 - 124 W/cm2 ) and unfocused (I = 0.50 - 0.78 W/cm2) 632.8 nm He-Ne laser sub-bandgap light in non-annealed and annealed a-As2S3 films has been experimentally studied. The focused light recording is found to be much more efficient (diffraction efficiency up to 14.9%, specific recording energy down to 216 J/(cm2%)) than the unfocused light recording (0.11%, 72400 J/(cm2%)). Some other properties are also different. The focused light recording is explained by the photothermally stimulated relaxational structural changes (RSC) accompanied by the photoinduced generation and recharging of D-centers. The unfocused light recording is explained by the photorientation of D-centers with some contribution of RSC . SBLR in materials other than a-As2S3 films was considered and the conclusion was made that amorphous sulfides and selenides are expected to be the best SBLR recording materials. SBLR is advantageous because of its bulk nature enabling the production of homogeneous holographic optical volume elements and devices.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Andris Ozols and Dmitry Saharov "Sub-bandgap light hologram recording in amorphous chalcogenides", Proc. SPIE 6596, Advanced Optical Materials, Technologies, and Devices, 65961C (25 January 2007); https://doi.org/10.1117/12.726508
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KEYWORDS
Holograms

Holography

Glasses

Chalcogenides

Chemical species

Helium neon lasers

Crystals

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