Open AccessНаведенное двулучепреломление в квантовых точках CdSe в матрице фосфатного стекла
Author(s) -
В.И. Красовский,
С.И. Расмагин
Publication year - 2021
Publication title -
optika i spektroskopiâ
Language(s) - English
Resource type - Journals
eISSN - 2782-6694
pISSN - 0030-4034
DOI - 10.21883/os.2021.01.50442.184-20
Subject(s) - materials science , nanosecond , anisotropy , ellipsometry , nanocomposite , kerr effect , dielectric , tensor (intrinsic definition) , nonlinear system , quantum dot , optics , analytical chemistry (journal) , molecular physics , optoelectronics , thin film , chemistry , nanotechnology , physics , laser , quantum mechanics , mathematics , chromatography , pure mathematics
In this paper, we report on the experimental observation of light-induced anisotropy (the optical Kerr effect) due to third-order nonlinear dielectric susceptibility (3) in a nanocomposite material consisting of CdSe quantum dots in a phosphate glass matrix. The signs and values of the off-diagonal components of the tensor (3) are determined using z-scanning techniques and nonlinear ellipsometry. It was shown that the nonlinear response contains three time components, the fastest of which does not exceed 20 ps, the average has an exponential form and amounted to 90 11 and 38530 ps for different samples, and the longest nonexponential and amounts to times of the order of a few nanoseconds. The switching of an optical signal with a time not exceeding 20 ps is demonstrated.