Recording and self-enhancement of dynamic polarization gratings in degenerate four-wave-mixing geometry

A. Ozols; A. Belyaev; V. Kokars; P. Augustovs; K. Traskovskis; D. Saharov

doi:10.1117/12.2084046

22 October 2014 Recording and self-enhancement of dynamic polarization gratings in degenerate four-wave-mixing geometry

A. Ozols, A. Belyaev, V. Kokars, P. Augustovs, K. Traskovskis, D. Saharov

Proceedings Volume 9421, Eighth International Conference on Advanced Optical Materials and Devices (AOMD-8); 942108 (2014) https://doi.org/10.1117/12.2084046
Event: Eighth International Conference on Advanced Optical Materials and Devices, 2014, Riga, Latvia

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.

Citation Download Citation

A. Ozols, A. Belyaev, V. Kokars, P. Augustovs, K. Traskovskis, and D. Saharov "Recording and self-enhancement of dynamic polarization gratings in degenerate four-wave-mixing geometry", Proc. SPIE 9421, Eighth International Conference on Advanced Optical Materials and Devices (AOMD-8), 942108 (22 October 2014); https://doi.org/10.1117/12.2084046

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KEYWORDS

Polarization

Holography

Photodetectors

Chalcogenides

Holograms

Glasses

Image transmission

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