Browsing by Subject "absorption"

Sort by: Order: Results:

  • Absorption and Luminescence Spectra of Ga-based Chalcogenide Glasses 
    LUPAN, E.V.; IOVU, M.S. (Technical University of Moldova, 2017)
    Excellent optical properties of chalcogenide glasses make them interesting for optoelectronic devices in the visible (VIS) and, especially, in the near (NIR)- and mid-infrared (MIR) spectral regions. Special interest ...
  • The band structure of birefractive CdGa2S4 crystals 
    STAMOV, I. G.; SYRBU, N. N.; PARVAN, V. I.; ZALAMAI, V. V.; TIGINYANU, I. M. (Elservier, 2013)
    In this paper, we report on the spectral dependence of Δn=no−ne for CdGa2S4 single crystals for shorter and longer wavelengths than the isotropic wavelength λ0=485.7nm (300K). It was established that Δn is positive at λ>λ0 ...
  • The Band Structure of TlGaSe2 Crystals 
    SYRBU, N. N.; ZALAMAI, V. V.; STAMOV, G.; NEMERENCO, L. N. (Open Science Publishers, 2015)
    Energies of electron transitions for the energy diapason 2 - 6 eV were identified from the analysis of reflection and wavelength modulated reflection spectra measured at temperature 30 K. Bands parameters were determined ...
  • Effect of the topological transition on the optical absorption edge of sulphur-based glasses 
    TSIULYANU, D. I.; MARIAN, S. I. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 1996)
    Exponential absorption edge of chalcogenide glassy alloys with sulphur in the region of topological transition is studied. It is shown that the slope of the tail depends on mean coordination number and stoichiometry of the ...
  • Effective light absorption spectra of endogenic porphyrins in soft biotissue 
    SONTEA, V. P.; ABRAMOVICH, N. D.; BARUN, V. V.; DICK, S. K.; SERYAKOV, A. (IEEE, 2015)
    Light action spectra for main skin chromophores are simulated. Endogenic porphyrins (Pp IX, Cp III, and Up III) are selected as target chromophores. They can produce singlet oxygen (SO) under tissue irradiation, which acts ...
  • Elaborarea modulului de cercetare a nanosenzorilor de radiație și softului de achiziție date pentru realizarea misiunilor nanosatelitului “TUMnanoSAT” 
    BARANEȚCHI, Anatoli (Universitatea Tehnică a Moldovei, 2020)
    Structura lucrării: Introducere; Capitolul 1: Cercetarea radiației spațiale și influența asupra dispozitivelor electronice; Capitolul 2: Elaborarea modululi de cercetare a nanosenzorilor de radiație și softului de ...
  • Energy band structure and optical constants of ZnAs2 crystals 
    STAMOV, I. G.; SYRBU, N. N.; URSAKI, V. V.; DOROGAN, A. V. (ELSEVIER, 2012)
    The fine structure of the Fabry–Perot interference as well as the interference of ordinary and extraordinary waves is investigated in ZnAs2 crystals. ε1, ε2, n and k optical constants are calculated in a wide spectral range ...
  • Energy Band Structure of the Tetragonal Crystals ZnP2 and CdP2 
    SOBOLEV, V. V.; SYRBU, N. N.; SUSHKEVICH, T. N. (John Wiley & Sons, Inc., 1971)
    The anisotropic spectra of edge absorption, photoconductivity, emission, and reflectivity of the tetragonal ZnP2 and CdP2 crystals have been experimentally investigated in the range 1 to 12.5 eV. The selection rules for ...
  • Excitonic spectra and band structure of CdGa2Se4 birefractive crystals 
    SYRBU, N. N.; STAMOV, I. G.; PARVAN, V. I.; ZALAMAI, V. V.; TIGINYANU, I. M. (Elservier, 2013)
    We report on the intersection of spectral dependences of refractive indices no and ne at the wavelengths 546nm (λ0) and 450nm (λ01) in CdGa2Se4 single crystals. The value of difference Δn=ne−no is equal to zero at the ...
  • Features of luminescence in semiconductor quantum wires in external electric and magnetic fields 
    SINYAVSKY, Elerlange; KOSTYUKEVICH, Nina (Technical University of Moldova, 2017)
    The interband optical transitions in quantum wires in a model of a parabolic potential in an electric and magnetic field directed perpendicular to the nanowire axis are studied theoretically. The frequency dependences of ...
  • Free and bound exciton luminescence of ZnP2 –D48 
    SYRBU, N. N.; STAMOV, I. G.; DOROGAN, A. V.; NEMERENCO, L. L. (Academy of Sciences of Moldova, 2007)
    Thin structure of polarized absorption spectra of indirect transitions with phonon emission in the ZnP2 crystals is investigated. In the luminescence spectra, radiation of phonons at annihilation of free excitons ...
  • Infrared Absorption by Free Carriers in Quasi-One-Dimensional Organic Crystals of Tetrathiotetracene–Iodide 
    CASIAN, Anatolie; DUSCIAC, Viorel; NICIC, Veaceslav (American Scientific Publishers, 2011)
    The coefficient of long wave infrared (IR) absorption has been calculated at room temperature in quasi-one-dimensional organic crystals of TTT2I3 type (TTT is the tetrathiotetracene) as a function of radiation frequency ν ...
  • Interference of ordinary and extraordinary waves in AgAsS2 crystals 
    SYRBU, N. N.; STAMOV, I. G.; URSAKI, V. V.; PARVAN, V.; IVANENCO, Yu. (ELSEVIER, 2012)
    The anisotropy of the near-bandgap absorption is investigated in AgAsS2 crystals. The refraction indices, n and n respectively for the Ec and Ec polarizations as well as the spectral dependence of the refraction ...
  • Micro-oxygenation of wine in presence of dissolved carbon dioxide 
    DEVATINE, Audrey; CHICIUC, Igor; POUPOT, Christian; MIETTON-PEUCHOT, Martine (Elsevier, 2007)
    Techniques for micro-oxygenation of wines are now accepted practices in wine manufacturing. But, at present time, only wine tasting and empirical know-how are used to control the oxygen input. Our work aims at a better ...
  • Multiply Scattered Light Fields in Tooth Tissue 
    MEHRNOOSH, M. Salimi Zadeh; DICK, S. K.; BARUN, V. V.; MEHRDAD, M. Salimi Zadeh (Technical University of Moldova, 2015)
    Optical characteristics of three tissue layers, namely of enamel, dentin, and pulp, are compiled over the wavelength range from the visible to the near infrared on the base of available publications and own calculations. ...
  • New luminescent compounds based on chalcogenides and organic materials 
    IOVU, M. S.; ANDRIESH, A. M.; VERLAN, V. I.; BUZURNIUC, S. A.; CULEAC, I. P.; NISTOR, YU. H.; ZUBAREVA, V. (National Institute of Optoelectronics, Romania, 2009)
    Data concerning fabrication and luminescent properties of new composite materials on the base of organic coordination compounds of Eu(III) (Eu(TTA)3H2O, Eu(TTA)3Phen or Eu(DBM)3Phen dispersed in SBMA copolymer are presented. ...
  • Optical absorption and thermal expansion of semiconductor glasses As-S-Ge by topological transition 
    TSIULYANU, D.; GUMENYUK, N.; MARIAN, S. (Society of Photo-Optical Instrumentation Engineers, SPIE, 1995)
    The effect of mean coordination number r on the optical absorption in the region of exponential tail and on the thermal expansion of chalcogenide glasses As-S-Ge are presented. Several important parameters such as optical ...
  • Optical and photoelectrical features in nanocrystalline indium oxide 
    FORSH, Ekaterina; MARTYSHOV, Mikhail; FORSH, Pavel; KASHKAROV, Pavel (Tehnica UTM, 2014)
    Spectral dependencies of absorption coefficient and persistent photoconductivity in nanocrystalline indium oxide (In2O3) are studied. Nanostructured In2O3 samples with various nanocrystals size are prepared by sol-gel ...
  • Optical and photoelectrical properties and band structure of single crystals of solid solutions of the system (CdS)3x–(In2S3)1−x 
    RADAUTSAN, S. I.; SYRBU, N. N.; TEZLEVAN, V. E.; SHERBAN, K. F.; STRUMBAN, E. E. (WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim, 1973)
    The spectra of edge absorption, photoconductivity, and reflectivity of single crystals of solid solutions on the basis of CdIn2S4 have been studied. The values of Eg, the character of transitions responsible for Eg, the ...
  • Optical characterization of the new nanocomposite SBMA/Eu(TTA)3(Ph3PO)2 
    BORDIAN, Olga; VERLAN, Victor; CULEAC, Ion; IOVU, Mihail; ZUBAREVA, Vera; NISTOR, Iurie (SPIE, Society of Photo-Optical Instrumentation Engineers, 2015)
    We describe a new nanocomposite material based on the copolymer of styrene with butyl methacrylate (1:1) (SBMA), and coordinating compound of Europium(III) Eu(TTA)3(Ph3PO)2. The SBMA/Eu(TTA)3(Ph3PO)2 nanocomposite was ...

Search DSpace

Browse

My Account