Electric field-induced optical second harmonic generation in nematic liquid crystal 5CB

18th International School on Condensed Matter Physics: "Challenges of Nanoscale Science: Theory, Materials, Applications"

Torgova, S.I.^1 ; Shigorin, V.D.^2 ; Maslyanitsyn, I.A.^2 ; Todorova, L.^3 ; Marinov, Y.G.^3 ; Hadjichristov, G.B.^3 ; Petrov, A.G.^3

Lebedev Physical Institute, Russian Academy of Sciences, Leninskij pr. 53, Moscow

119991, Russia^1

Prokhorov General Physics Institute, Russian Academy of Sciences, ul. Vavilova 38, Moscow

119991, Russia^2

Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko chaussee, Sofia

1784, Bulgaria^3

关键词: 4 Cyano 4' pentylbiphenyl (5CB);    Dc electric field;    Electric field induced;    Electric field induced second-harmonic generations;    Initial orientation;    Interference patterns;    Optical second harmonic generation;    Transmission geometries;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/558/1/012025/pdf
DOI  :  10.1088/1742-6596/558/1/012025

来源: IOP

【 摘 要 】

Electric field-induced second harmonic generation (EFISH) was studied for the liquid crystal 4-cyano-4'-pentylbiphenyl (5CB) (a nematic phase material at room temperature). The intensity of coherent SHG from 5CB cells upon DC electric field was measured for various initial orientations of the liquid crystal. The dependence of the SHG intensity on the pump beam incidence angle was obtained in transmission geometry using sample rotation method. The experimental results (the registered light intensity in the output SHG interference patterns) were theoretically modelled and analyzed.