MEASURING LOCAL QUANTUM YIELD OF PHOTOLUMINESCENCE AND PHOTOTRANSFORMATIONS WITH LASER SCANNING MICROSCOPE

Measurement of local quantum yields for the photoluminescence of semiconductor nanocrystals (quantum dots) and photoinduced transformations of dye molecules in polymer films is demonstrated using a laser scanning microscope capable of mapping luminescence spectra and intensities of transmitted laser light. The confocal scanning microscope (Zeiss LSM710) was applied for both the induction of photochemical transformations and measurement The luminescence quantum yield values for quantum dots in different locations of a polymer film were found to differ, ostensibly depending on their aggregation. To measure photoisomerization quantum yield, the effects of scanning a tiny area of a polymer film with a focused beam on the intensities of luminescence and transmitted light were monitored

Investigation of Nonlinear Optical Properties of Quantum Dots Deposited onto a Sample Glass Using Time-Resolved Inline Digital Holography

We report on the application of time-resolved inline digital holography in the study of the nonlinear optical properties of quantum dots deposited onto sample glass. The Fresnel diffraction patterns of the probe pulse due to noncollinear degenerate phase modulation induced by a femtosecond pump pulse were extracted from the set of inline digital holograms and analyzed. The absolute values of the nonlinear refractive index of both the sample glass substrate and the deposited layer of quantum dots were evaluated using the proposed technique. To characterize the inhomogeneous distribution of the samples’ nonlinear optical properties, we proposed plotting an optical nonlinearity map calculated as a local standard deviation of the diffraction pattern intensities induced by noncollinear degenerate phase modulation.publishedVersionPeer reviewe

Reindustrialization, International Practices, and the Opportunities of Ekaterinburg (the case of the Uralmash district)

The article deals with the international practices of industrial areas renovation in the US and Spain. The main positive trends of the countries' development are described. The article also presents the theory of Mazayev, G.V. regarding the ranking of technological paradigms and their interconnection with a modern city. The city of Ekaterinburg is reviewed as a multi-paradigm city that includes industrial areas of the III technological paradigm. Considering the renovation from the point of view of the international practices and Mazayev's theory, a conclusion regarding Russia, particularly, Ekaterinburg, the Uralmash district, is made. The optimal path of developing the area of Uralmashzavod, PJSC, is presented. The conclusions regarding Ekaterinburg and, particularly, the Uralmash district are made based on the foreign countries' experience: the best scenario for the area of Uralmashzavod, PJSC will be transformation into a technology park with the advantages stated herein. © 2019 Published under licence by IOP Publishing Ltd