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

Proceedings of SPIE 2014
Andris Ozols, Aleksandrs Beļajevs, Valdis Kokars, Pēteris Augustovs, Kaspars Traskovskis, Dmitrijs Saharovs

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

Atslēgas vārdi
dynamic holography, polarization gratings, degenerate four-wave mixing, self-enhancement of gratings, two-wave mixing.
DOI
10.1117/12.2084046
Hipersaite
http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1919880

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

Publikācijas valoda
English (en)