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Browsing Articole din publicaţii internaţionale by Author "IOVU, M. S."

Browsing Articole din publicaţii internaţionale by Author "IOVU, M. S."

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  • Absorption and photoluminescence of Ga-La-S:O and Ga-Ge-As-S glasses doped with rare-earth ions 
    IOVU, M. S.; ANDRIES, A. M.; SYRBU, N. N.; SEDDON, A. B.; FURNISS, D.; ADRIAENSSENS, G. J.; TVER'YANOVICH, Yu. S. (Society of Photo-Optical Instrumentation Engineers, SPIE, 2007)
    The visible luminescence from Pr3+, Dy3+, Nd3+, Sm3+ and co-doped with Ho3+ and Dy3+ ions embedded in Ga0.017Ge0.25As0.083S0.65 glass hosts at room temperature and at T10 K is reported, when pumping with an Ar+-ion laser ...
  • Absorption and photoluminescence of Ga0.017Ge0.25As0.083S0.65 glasses doped with rare-earth ions 
    IOVU, M. S.; ANDRIESH, A. M.; LUPAN, E. V.; CIORNEA, V. I.; SYRBU, N. N. (Society of Photo-Optical Instrumentation Engineers, SPIE, 2007)
    The visible luminescence from Pr3+, Dy3+, Nd3+, Sm3+ and codoped with Ho3+ and Dy3+ ions embedded in Ga0.017Ge0.25As0.083S0.65 glass hosts at room temperature and at T=10 K is reported, when pumping with an Ar+-ion laser ...
  • Binary Superimposed Gratings Formed by e-Beam Recording in Amorphous AsS Films 
    SERGEEV, S. A.; IOVU, M. S.; ENACHI, M. A. (American Scientific Publishers, 2014)
    Binary unidirectional superimposed diffraction gratings with grating periods of 0.9 μm and 1 μm were formed in amorphous AsS films by e-beam recording. The influence of recording sequence of index superimposed gratings on ...
  • Characterization of the luminophore compounds based on Eu3+ ions coordinated with different ligands 
    VERLAN, V. I.; BORDIAN, O.; CULEAC, I. P.; IOVU, M. S.; ZUBAREVA, V. E. (Institutul de Fizică Aplicată al AŞM, 2016)
    Organic materials on Eu3+ ions base are excellent materials for a new generation of light emitting devices with high efficiency, and wide potential applications as luminescent labels in biological systems, etc. Organic ...
  • The effect of oxygen on optical absorption and emission of Pr:Ga–La–S glass 
    SEDDON, A. B.; FURNISS, D.; IOVU, M. S.; SHUTOV, S. D.; SYRBU, N. N.; ANDRIESH, A. M.; ADRIAENSSENS, G. J. (Elservier, 2003)
    The absorption and emission spectra of Ga–La–S–O glasses with fixed cation ratio Ga/La=0.7/0.3 and two oxygen contents 0.65 wt% and 2.95 wt% were studied for two Pr3+ doping levels of 0.1 and 1.0 wt%. Presence of oxygen ...
  • Fiber optic speckle based interferometry for IR radiation sensing and intrusion monitoring systems 
    CULEAC, I. P.; NISTOR, Iu. H.; IOVU, M. S.; ANDRIESH, A. M. (Institutul de Fizică Aplicată al AŞM, 2010)
    In the previous paper we have reported a fiber optic method for registration of low intensity infrared radiation based on the effect of interference of propagation modes in the far field of a multimode fiber. In this paper ...
  • Infrared Reflectance Investigation of the Structure of xSb2S3.(l-x)As2S3 Glasses 
    KAPOUTSIS, J. A.; KAMITSOS, E. I.; CULEAC, I. P.; IOVU, M. S. (Springer Nature Switzerland, 1997)
    Chalcogenide glasses have attracted much attention over the years in light of their technological applications, including infrared transmitting optical elements, acoustooptic and memory switching devices, and materials ...
  • Infrared Vibrational Modes and Anisotropy of the Effective Ionic Charge in CuAlSe2, CuAlS2, and CuGaSe2 Crystals 
    ANDRIESH, A. M.; SYRBU, N. N.; IOVU, M. S.; TAZLAVAN, V. E. (WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim, 1995)
    Reflectivity spectra of CuAlS2, CuAlSe2, and CuGaSe2 crystals have been investigated in the wave number range 50 to 600 cm−1 for the polarizations E ‖ c and E ⊥ c. The fundamental phonon parameters, the limiting dielectric ...
  • Investigation of hole transport in vitreous As2S3 
    ANDRIESH, A. M.; IOVU, M. S.; KOLOMEYKO, E. P.; TSIULYANU, D. I.; SHUTOV, S. D. (Elsevier, 1980)
    The time-of-flight measurements of the hole drift in As2S 3 films have shown that below 80°C the typical dispersive transport occurs. Very low drift mobility values (~10-10cm2/Vs at 45oc) correspond to an activation energy ...
  • IR sensing by fiber-optic speckle based interferometer 
    CULEAC, I. P.; NISTOR, Iu. H.; ANDRIESH, A. M.; IOVU, M. S.; ZAGONENCO, V. F. (Institutul de Fizică Aplicată al AŞM, 2012)
    In the previous papers we presented a speckle-based fiber optic method for registration of low intensity infrared radiation, which is based on the interference of propagation modes in the far field of a multimode fiber. ...
  • New composite materials for optoelectronic applications 
    IOVU, M. S.; BUZURNIUC, S. A.; VERLAN, V. I.; CULEAC, I. P.; NISTOR, Yu. H. (SPIE, Society of Photo-Optical Instrumentation Engineers, 2009)
    The problem of obtaining low cost but efficient luminescent materials is still actually. Data concerning fabrication and luminescent properties of new composite materials on the base of thenoyltrifluoroacetone (TTA) of ...
  • 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 photoluminescence of lumonophore nanocomposites 
    VERLAN, V. I.; IOVU, M. S.; ANDRIESH, A. M.; NISTOR, Yu. H.; CULEAC, I.; MALAHOV, L.; TURTA, C. I.; ZUBAREVA, V. E. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2011)
    The europium complex tris(dibenzoylmethane)(monophenanthroline)europium (III) (Eu(DBM)3Phen) was successfully incorporated with different molar ratios into organic copolymer matrix of styrene:butylmethacrilate (1:1) (SBMA) ...
  • Optical and photoluminescence characteristics of amorphous nanocomposites containing organic compounds with Eu+3 and polymers 
    VERLAN, V. I.; IOVU, M. S.; CULEAC, I.; NISTOR, YU. H.; TURTA, C. I.; ZUBAREVA, V. E. (National Institute of Optoelectronics, Romania, 2011)
    Thin films (1-10 µm thickness) of nanocomposites (NC) based on polymers and organic coordinated compounds (OCC) Eu(TTA)3H2O, Eu(TTA)3Phen, Eu(DBM)3Phen, Eu(TTA)2(Ph3PO)2NO3 (where TTA is thenoyltrifluoroacetonate (C8H5F3O2S), ...
  • Optical and Photoluminescence Properties of Nanocomposites Polymer-Compounds Coordinated with Eu+3 Ions 
    VERLAN, V. I.; IOVU, M. S.; CULEAC, I. P.; TURTA, C. I.; ZUBAREVA, V. E. (American Scientific Publishers, 2012)
    Thin films (1–3 μm thickness) of nanocomposites (NCs) based on organic compounds with Eu3+ ions (Eu(TTA)3H2O, Eu(TTA)3 Phen, Eu(DBM)3 Phen and Eu(TTA)2(Ph3PO)2NO3 and polymer polyvinylpyrrolidone (PVP) or copolymer ...
  • Photoluminescence properties of PVP/Eu(TTA)2(Phen3PO)2NO3 nanocomposites 
    VERLAN, V. I.; IOVU, M. S.; CULEAC, I.; NISTOR, Y.; TURTA, C. I.; ZUBAREVA, V. E. (Elsevier, 2011)
    Thin films (1–10μm thickness) of nanocomposites (NC) based on organic coordinated compound (OCC) Eu(TTA)2(Phen3PO)2NO3 (where TTA is thenoyltrifluoroacetonate (C8H5F3O2S), Phen – 1,10-phenanthroline (C12H8N2)) and polymer ...
  • Photoluminescent thin films with nanostructured surface 
    ANDRIESH, A. M.; IOVU, M. S.; CULEAC, I. P.; NISTOR, Iu. H.; ROBU, Şt.; DRAGALINA, G.; POPUŞOI, A.; MITCOV, D.; ENACHE, M.; PETRENKO, P. (Institutul de Fizică Aplicată al AŞM, 2012)
    We present here experimental results on polymer-inorganic nanocomposite material made of styrene with butyl methacrylate (SBMA) with isothiocyanato-chalcone (ITCC) and inorganic semiconductor CdS. Styrene with butyl ...
  • Photouminescence and Optical Properties of PVP/Tb(TTA)2(Ph3PO)2NO3 Nanocomposites 
    VERLAN, V. I.; IOVU, M. S.; CULEAC, I.; NISTOR, Y. H.; TURTA, C. I.; ZUBAREVA, V. E. (SPIE, 2012)
    Thin films (1-10 μm thickness) of nanocomposites (NCs) based on coordinated compounds (CC) Tb(TTA)2(Ph3PO)2NO3 (where TTA is thenoyltrifluoroacetonate (C8H5F3O2S), Ph3PO - triphenylphosphine oxide) and polymer – ...
  • Raman Spectra in As-Based Chalcogenide Optical Fibers 
    IOVU, M. S.; CULEAC, I. P.; KOUDELKA, Ladislav; VOYNAROVYCH, Ivan; VLCEK, Miroslav (American Scientific Publishers, 2014)
    Raman spectra for optical fiber samples prepared from As-based chalcogenide glass composition (As50S50, As40S60, As25S75, (As40S60)0.95:(As40Se60)0.05 and (As40S60)0.95:(Sb40S60)0.05 are investigated. The primary maximum ...
  • Speckle-based fiber optic method for registration of IR radiation 
    CULEAC, I. P.; NISTOR, Iu. H.; IOVU, M. S.; ANDRIESH, A. M. (SPIE, 2010)
    A high sensitivity speckle based fiber-optic method for registration of low intensity IR radiation is proposed. The method is based on the effect of variation of the speckle pattern in the far-field of a multimode fiber. ...

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