Investigations of optical polarizing limiting by nematic liquid crystals with carbon nanoparticles

P. P. Maksimyak; A. L. Nehrych

doi:10.1117/12.2567956

20 August 2020 Investigations of optical polarizing limiting by nematic liquid crystals with carbon nanoparticles

P. P. Maksimyak, A. L. Nehrych

Proceedings Volume 11460, Metamaterials, Metadevices, and Metasystems 2020; 114602J (2020) https://doi.org/10.1117/12.2567956
Event: SPIE Nanoscience + Engineering, 2020, Online Only

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Abstract

Experimental investigations of the effects of limiting of a beam traversing a different light-scattering medium based on liquid crystals are presented. It is shown that the result of limiting of the beam at the output of the medium depends on the magnitudes of the phase delays of the singly forward scattered partial signals. Investigations of the effects of limiting has been carried out using nematic liquid crystals MBBA with carbon nanotubes (CNT) in comparison wihs a solution of the same liquid crystals doped by carbon nanodots. Liquid crystals dopped by carbon nanotubes or nanodots, located between crossed polarizers, delays external optical radiation as its power increases to a certain critical level. This can be explained by the phase changes in the LC dopped by the nanoparticles under the action of heating aimed by radiation or an applying external electromagnetic field. Observed phenomena strongly influenced by shape, size and concentration of CNT, as well as the sensitivity of the liquid crystal to the illuminating beam power rate has increased.

Citation Download Citation

P. P. Maksimyak and A. L. Nehrych "Investigations of optical polarizing limiting by nematic liquid crystals with carbon nanoparticles", Proc. SPIE 11460, Metamaterials, Metadevices, and Metasystems 2020, 114602J (20 August 2020); https://doi.org/10.1117/12.2567956

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