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Proceedings Paper

Recording and self-enhancement of dynamic polarization gratings in degenerate four-wave-mixing geometry
Author(s): A. Ozols; A. Belyaev; V. Kokars; P. Augustovs; K. Traskovskis; D. Saharov
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Paper Abstract

Scalar and vectorial degenerate four-wave-mixing (DFWM) in azobenzene molecular K-RJ-4-3 [N,N-bis(5,5,5- tryphenylpentyl)-4-((4-tritylphenyl)diazenyl)aniline] and in chalcogenide a-As2S3 glassy films is experimentally investigated. A coherent self-enhancement (CSE) of holographic gratings (HG) in this geometry was experimentally confirmed, for the first time to our knowledge, thus establishing a new method of HG recording, the DFWM CSE recording. Scalar linear s-s, p-p and circular R-R(right) polarizations and orthogonal linear s-p and circular L(left)-R polarizations were used for HG recording with 2 μm period at 532 nm. In the case of K-RJ-4-3 film L-R polarizations were the most efficient enabling the maximum DFWM efficiency ρmax=14.5% whereas in the case of a-As2S3 film s-s polarizations were the best with ρmax=6.0%. DFWM CSE recording has exhibited a different polarization dependence compared to normal DWFM recording. CSE factor ρ/ρ0 (ρ0 being the initial ρ) was the highest for K-RJ-4-3 film (6.8) with s-s polarizations compared to 3 for a-As2S3 film with p-p polarizations. Two-wave HG recording was also studied for comparison.

Paper Details

Date Published: 22 October 2014
PDF: 11 pages
Proc. SPIE 9421, Eighth International Conference on Advanced Optical Materials and Devices (AOMD-8), 942108 (22 October 2014); doi: 10.1117/12.2084046
Show Author Affiliations
A. Ozols, Riga Technical Univ. (Latvia)
A. Belyaev, Riga Technical Univ. (Latvia)
V. Kokars, Riga Technical Univ. (Latvia)
P. Augustovs, Riga Technical Univ. (Latvia)
K. Traskovskis, Riga Technical Univ. (Latvia)
D. Saharov, Riga Technical Univ. (Latvia)

Published in SPIE Proceedings Vol. 9421:
Eighth International Conference on Advanced Optical Materials and Devices (AOMD-8)
Janis Spigulis, Editor(s)

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