Abstract
The nonlinear optical response of a colloidal solution of planar CdSe semiconductor nanocrystals (nanoplatelets) is studied for the first time. The nonlinear optical response of these nanoparticles is compared to that of spherical CdSe nanocrystals (quantum dots). The photoinduced nonlinearity is attributed to the optical generation of long-lived charge carriers in the nanoobjects under study. It is shown that, upon the exposure of a cell with the solution of nanoparticles to focused continuous-wave (cw) laser radiation with a wavelength of 473 nm, the nonlinear optical responses of CdSe nanoplatelets and quantum dots are somewhat different at identical optical densities at the above-indicated wavelength. The differences are supposedly associated with a higher diffusion rate of spherical nanoparticles in the solution because of their smaller size compared to that of nanoplatelets.
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Original Russian Text © A.S. Selyukov, A.A. Isaev, A.G. Vitukhnovsky, V.L. Litvak, A.V. Katsaba, V.M. Korshunov, R.B. Vasiliev, 2016, published in Fizika i Tekhnika Poluprovodnikov, 2016, Vol. 50, No. 7, pp. 963–966.
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Selyukov, A.S., Isaev, A.A., Vitukhnovsky, A.G. et al. Nonlinear optical response of planar and spherical CdSe nanocrystals. Semiconductors 50, 947–950 (2016). https://doi.org/10.1134/S1063782616070228
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DOI: https://doi.org/10.1134/S1063782616070228