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  • Microchip laser operation of Tm,Ho:KLu(WO4)2 crystal 

    Loiko, P.; Serres, J. M.; Mateos, X.; Yumashev, K.; Kuleshov, N.; Petrov, V.; Griebner, U.; Aguilo, M.; Diaz, F. (2014)
    A microchip laser is realized on the basis of a monoclinic Tm,Ho-codoped KLu(WO4)2 crystal cut for light propagation along the Ng optical indicatrix axis. This crystal cut provides positive thermal lens with extremely weak astigmatism, S/M = 4%. High sensitivity factors, M = dD/dPabs, of 24.9 and 24.1 m−1/W for the mg- and pg- tangential planes are calculated with respect to the ...
    2017-11-15
  • Micro-Raman Investigation of Hydrogen Localized in Cone-Shaped Defects Formed on the Silicon Wafer Surface 

    Frantskevich, N. V.; Fedotov, A. K.; Frantskevich, A. V.; Mazanik, N. V. (2015)
    The goal of this work is the micro-Raman study of molecular hydrogen localized in cone-shaped defects, which are formed on the surface of previously helium implanted and annealed Czochralski Si wafers as a result of hydrogen plasma treatment. The line at ≈ 4158 cm corresponding to molecular hydrogen is observed in the Raman spectra when the laser beam is focused both on cone-shaped ...
    2017-11-04
  • Graphene Q-Switched Compact Yb: YAG Laser 

    Serres, J. M.; Jambunathan, V.; Mateos, X.; Loiko, P.; Lucianetti, A.; Mocek, T.; Yumashev, K.; Petrov, V.; Griebner, U.; Aguilo, M.; Diaz, F. (2015)
    We describe a compact Yb: YAG laser Q-switched by a graphene-based saturable absorber and pumped by a laser diode at 932 or 969 nm. The compact laser generates a maximum average output power value of 185 mW at 1032 nm with a slope efficiency value of 12%. The shortest duration of the Q-switched pulse achieved is 228 ns at a repetition frequency of 285 kHz. The maximum pulse energy ...
    2017-11-04
  • Influence of Shell Parameters on Optical Properties of Spherical Metallic Core-Oxide Shell Nanoparticles 

    Pustovalov, V. K.; Astafyeva, L. G. (2015)
    Different metal homogeneous nanoparticles have been extensively studied in recent years due to their wide range of potential applications. It is very interesting to investigate core-shell nanoparticles with oxide shell from core metal. The formation of oxide shell on metallic nanoparticles can be achieved by different chemical and physical methods including also natural oxidation ...
    2017-11-04
  • Евразийские стандарты оценки стоимости: начало 

    Трифонов, Н. Ю. (2015)
    В статье обсуждаются вопросы стандартизации методологии оценочной деятельности в современных условиях меняющихся рынков и евразийской интеграции. Прокомментировано содержание первой редакции региональных стандартов – Евразийских стандартов оценки стоимости
    2017-10-05
  • Dynamics of photoinduced electron transfer in multiporphyrin nanoassemblies 

    Kilin, D.; Zenkevich, E.; von Borczyskowski, C. (World Scientific Publishing Co., 2015)
    In self-assembled nanoscale porphyrin triads based on Zn-octaethylporphyrin chemical dimer (donor, D) and dipyridyl substituted porphyrin free base (acceptor, A), fluorescence quenching of D (down to 1.7-10 ps) and A (by ~1.3-1.6 times) subunits is strongly dependent on the solvent polarity (toluene-acetone mixtures) and temperature (77-350 K). The obtained experimental findings ...
    2017-05-27
  • Structural Dynamics and Relaxation Processes with Participation of Excited Singlet and Triplet States in Sterically Hindered Porphyrins and Their Chemical Dimers 

    Zenkevich, E. I. (2014)
    Paper presents an overview of mutual Belarussian-Russian collaboration in the field of sterically hindered porphyrins compared with the relevant literature data. Typically, the conformational dynamics of a non-planar tetrapyrrole macrocycle at 295 K manifests itself in bathochromic absorption and fluorescence shifts (∆ν ~ 1100 cm⁻¹), the increase of the Stokes shift (∆νₛ ~ 900 ...
    2017-05-27
  • Self-organization principles in the formation of multiporphyrin complexes and “semiconductor quantum dot-porphyrin” nanoassemblies 

    Zenkevich, E. I.; von Borczyskowski, C. (2014)
    In this paper, we review several aspects of molecular recognition (based on non-covalent binding interactions) occurring between meso-pyridyl substituted tetrapyrrole extra-ligands and chemical dimers of tetrapyrrolic macrocycles containing central Zn ions and spacers of various nature and flexibility. Experimental results obtained by us earlier are analyzed using a novel approach ...
    2017-05-27
  • Ligand dynamics and temperature effects upon formation of nanocomposites based on semiconductor CdSе/ZnS quantum dots and porphyrins 

    Zenkevich, E. I.; Blaudeck, T.; Kowerko, D.; Stupak, A. P.; Cichos, F.; von Borczyskowski, C. (2012)
    Dye molecules with pyridyl side substituents (porphyrins and heterocyclic perylene diimides) coordinatively attached to semiconductor CdSe/ZnS quantum dots (QDs) surface form quasi-stable “QD-Dye” nanocomposites of various geometry in the competition with capping molecules (tri-n-octyl phosphine oxide or long chain amines) exchange. This results in photoluminescence (PL) quenching ...
    2017-05-27
  • Resonant Raman Scattering of ZnS, ZnO, and ZnS/ZnO Core/shell quantum dots 

    Milekhin, A. G.; Yeryukov, N. A.; Sveshnikova, L. L.; Duda, T. A.; Himcinschi, C.; Zenkevich, E. I.; Zahn, D. R. T. (2012)
    Resonant Raman scattering by optical phonon modes as well as their overtones was investigated in ZnS and ZnO quantum dots grown by the Langmuir–Blodgett technique. The in situ formation of ZnS/ZnO core/shell quantum dots was monitored by Raman spectroscopy during laser illumination.
    2017-05-27
  • Microchip laser operation of Tm,Ho:KLu(WO4)2 crystal 

    Loiko, P.; Serres, J. M.; Mateos, X.; Yumashev, K.; Kuleshov, N.; Petrov, V.; Griebner, U.; Aguilo, M.; Diaz, F. (2014)
    A microchip laser is realized on the basis of a monoclinic Tm,Ho-codoped KLu(WO4)2 crystal cut for light propagation along the Ng optical indicatrix axis. This crystal cut provides positive thermal lens with extremely weak astigmatism, S/M = 4%. High sensitivity factors, M = dD/dPabs, of 24.9 and 24.1 m−1/W for the mg- and pg- tangential planes are calculated with respect to the ...
    2017-11-15
  • Micro-Raman Investigation of Hydrogen Localized in Cone-Shaped Defects Formed on the Silicon Wafer Surface 

    Frantskevich, N. V.; Fedotov, A. K.; Frantskevich, A. V.; Mazanik, N. V. (2015)
    The goal of this work is the micro-Raman study of molecular hydrogen localized in cone-shaped defects, which are formed on the surface of previously helium implanted and annealed Czochralski Si wafers as a result of hydrogen plasma treatment. The line at ≈ 4158 cm corresponding to molecular hydrogen is observed in the Raman spectra when the laser beam is focused both on cone-shaped ...
    2017-11-04
  • Graphene Q-Switched Compact Yb: YAG Laser 

    Serres, J. M.; Jambunathan, V.; Mateos, X.; Loiko, P.; Lucianetti, A.; Mocek, T.; Yumashev, K.; Petrov, V.; Griebner, U.; Aguilo, M.; Diaz, F. (2015)
    We describe a compact Yb: YAG laser Q-switched by a graphene-based saturable absorber and pumped by a laser diode at 932 or 969 nm. The compact laser generates a maximum average output power value of 185 mW at 1032 nm with a slope efficiency value of 12%. The shortest duration of the Q-switched pulse achieved is 228 ns at a repetition frequency of 285 kHz. The maximum pulse energy ...
    2017-11-04
  • Influence of Shell Parameters on Optical Properties of Spherical Metallic Core-Oxide Shell Nanoparticles 

    Pustovalov, V. K.; Astafyeva, L. G. (2015)
    Different metal homogeneous nanoparticles have been extensively studied in recent years due to their wide range of potential applications. It is very interesting to investigate core-shell nanoparticles with oxide shell from core metal. The formation of oxide shell on metallic nanoparticles can be achieved by different chemical and physical methods including also natural oxidation ...
    2017-11-04
  • Евразийские стандарты оценки стоимости: начало 

    Трифонов, Н. Ю. (2015)
    В статье обсуждаются вопросы стандартизации методологии оценочной деятельности в современных условиях меняющихся рынков и евразийской интеграции. Прокомментировано содержание первой редакции региональных стандартов – Евразийских стандартов оценки стоимости
    2017-10-05

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