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Publikācija: Recording and Self-Enhancement of Dynamic Polarization Gratings in Degenerate Four-Wave Mixing Geometry

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Nosaukums oriģinālvalodā Recording and Self-Enhancement of Dynamic Polarization Gratings in Degenerate Four-Wave Mixing Geometry
Pētniecības nozare 1. Dabaszinātnes
Pētniecības apakšnozare 1.3. Fizika un astronomija
Autori Andris Ozols
Aleksandrs Beļajevs
Valdis Kokars
Pēteris Augustovs
Kaspars Traskovskis
Dmitrijs Saharovs
Atslēgas vārdi dynamic holography, polarization gratings, degenerate four-wave mixing, self-enhancement of gratings, two-wave mixing.
Anotācija 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
DOI: 10.1117/12.2084046
Hipersaite: http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1919880 
Atsauce Ozols, A., Beļajevs, A., Kokars, V., Augustovs, P., Traskovskis, K., Saharovs, D. Recording and Self-Enhancement of Dynamic Polarization Gratings in Degenerate Four-Wave Mixing Geometry. Proceedings of SPIE, 2014, Vol.9421: Eighth International Conference on Advanced Optical Materials and Devices (AOMD-8), 942108-1.-942108-11.lpp. ISSN 0277-786X. Pieejams: doi:10.1117/12.2084046
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