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This article is cited in 10 scientific papers (total in 10 papers)
Semiconductor structures, low-dimensional systems, quantum phenomena
Nonlinear optical properties of CdS/ZnS quantum dots in a high-molecular-weight polyvinylpyrrolidone matrix
A. S. Kulaginaab, S. K. Evstropievbc, N. N. Rosanovbcd, V. V. Vlasovb a Federal State Budgetary Institution of Higher Education and Science Saint Petersburg National Research Academic University of the Russian Academy of Sciences, St. Petersburg
b St. Petersburg National Research University of Information Technologies, Mechanics and Optics
c All-Russian Research Center "S. I. Vavilov State Optical Institute", St. Petersburg
d Ioffe Institute, St. Petersburg
Abstract:
Sols containing core/shell CdS/ZnS semiconductor quantum dots are synthesized and their nonlinear properties, which are interesting for a large variety of applications in nanophotonics, are studied. The quantum dots produced are smaller in dimensions than the exciton Bohr radius and, therefore, exhibit a well-pronounced quantum-confinement effect. The nonlinear optical properties of low-concentration sols are studied upon exposure to laser pulses with an emission wavelength of 532 nm and a duration of 5 ns by the z-scan technique. The dependences of nonlinear optical coefficients on the concentration of CdS/ZnS quantum dots are obtained. The intensity dependence of two-photon absorption coefficients is presented. The dependence determines the boundary of the influence of high-order nonlinearities on the nonlinear transmittance of the samples. The mechanisms of optical limitation exhibited by sols, specifically, two-photon absorption, nonlinear refraction, and nonlinear scattering are discussed.
Received: 12.09.2017 Accepted: 26.09.2017
Citation:
A. S. Kulagina, S. K. Evstropiev, N. N. Rosanov, V. V. Vlasov, “Nonlinear optical properties of CdS/ZnS quantum dots in a high-molecular-weight polyvinylpyrrolidone matrix”, Fizika i Tekhnika Poluprovodnikov, 52:8 (2018), 865–872; Semiconductors, 52:8 (2018), 997–1003
Linking options:
https://www.mathnet.ru/eng/phts5755 https://www.mathnet.ru/eng/phts/v52/i8/p865
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