Open AccessВлияние размерных параметров нанокристаллов DAST на их линейные и нелиейно-оптические параметры
Author(s) -
Т.Н. Погосян,
И.Ю. Денисюк,
Ngoc Diep Lai
Publication year - 2019
Publication title -
žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-748X
pISSN - 0044-4642
DOI - 10.21883/os.2019.03.47376.299-18
Subject(s) - nanocrystal , nucleation , materials science , attenuation coefficient , nonlinear optical , solvent , polymer , absorption (acoustics) , crystal (programming language) , second harmonic generation , laser , absorption spectroscopy , nonlinear optics , analytical chemistry (journal) , optics , nanotechnology , chemistry , nonlinear system , organic chemistry , composite material , computer science , physics , quantum mechanics , programming language
Nonlinear optical trans -4'-(dimethylamino)- N -methyl-4-stilbazolium tosylate (DATS) nanocrystals are synthesized in polymethylmethacrylate by nucleation in a drying polymer film at different solvent concentrations. Nanocrystals with sizes progressively increasing from 70 to 2500 nm are obtained. The effect of size on the nonlinear optical coefficient is studied by generation of the second harmonic of a 1064-nm Nd:YAG laser. It is shown that the nonlinear optical coefficient decreases with decreasing crystal size by no more than a factor of 1.5. The optical absorption spectra and the shape of nanocrystals are studied as functions of their size.