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Browsing Articole ştiinţifice by Author "ANDRIESH, A. M."

Browsing Articole ştiinţifice by Author "ANDRIESH, A. M."

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  • 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 ...
  • Arsenic trisulphide in isotype amorphous–crystalline heterojunctions 
    TSIULYANU, D. I.; ANDRIESH, A. M.; KOLOMEYKO, E. P. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 1978)
    Results are given of electrophysical properties of isotype amorphous As2S3-crystalline p-Si heterojunctions. It is shown that the forward currents are limited by the space charge in As2S3 and the reverse ones are limited ...
  • 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 ...
  • Evaluation of hole drift mobility in glassy As2S3 in the temperature range 77 - 330 K 
    ANDRIESH, A. M.; CULEAC, I. P.; EWEN, P. J. S.; OWEN, A. E. (National Institute of Optoelectronics, Romania, 2001)
    The temperature behaviour of time-averaged hole drift mobility in As2S3 glass was studied in the range 77-330 K on the basis of temperature dependence of steady-state photoinduced absorption. The time-averaged hole mobility ...
  • 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 ...
  • Fiber—optic displacement sensor 
    ANDRIESH, A. M.; CULEAC, I. P.; BINCHEVICI, V. A.; ABASHKIN, V. G.; SCHITSCO, V. N. (SPIE, Society of Photo-Optical Instrumentation Engineers, 1993)
    This paper describes a microbend displacement sensor with high sensitivity and wide dynamic range designed on the bases of multimode sensor—oriented fiber. A number of high sensitive sensors has been design on the basis ...
  • Formation of gap edges and shift of Fermi level in As2S3 - based glass alloys with addition of germanium 
    ANDRIESH, A. M.; TSIULYANU, D. I. (Elsevier, 1987)
    The gap formation with the composition change is studied on the basis of complex analysis of the experimental results obtained by investigation of optical absorption and conductivity of both As2S3 Ge glassy materials and ...
  • Generation of coherent phonon pulses by hot electrons in non-crystalline semiconductors 
    ANDRIESH, A. M.; ENAKI, N. A.; KOROLI, V. I.; CULEAC, I. P.; CIORNEA, V. I. (National Institute of Optoelectronics, Romania, 2000)
    We study the cooperative generation of phonon pulses in semiconductors by groups of inverted equidistant multilevel coupled excitations (electrons, excitons). Such equidistant systems take place in chalcogenide glasses ...
  • Influence of annealing and temperature on the absorption edge of As2S3-Ge amorphous films 
    ANDRIESH, A. M.; TSIULYANU, D. I. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 1973)
    Results are presented of absorption edge investigations of AsS1.5Gex amorphous films (0 ≤ × ≤ 2) at temperatures of 110, 300, 370, and 420 °K. An effect of low-temperature annealing on the optical parameters of the films ...
  • 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. ...
  • Kinetics of photoinduced absorption in chalcogenide-glass fibers 
    ANDRIESH, A. M.; BINCHEVICI, V. A.; COPACI, T. N.; CULEAC, I. P.; ENACHI, N. A.; LOGHIN, V. M. (SPIE, Society of Photo-Optical Instrumentation Engineers, 1995)
    Experimental and theoretical results are presented for the kinetics of photoinduced absorption in chalcogenide glass fibres. Photoinduced absorption measurements were carried out both at room temperature as well as at ...
  • The mechanism of enhancement of photoinduced absorption in As2S3 glass at sub-bandgap illumination 
    ANDRIESH, A. M.; ENACHI, N. A.; CULEAC, I. P.; COPACI, T. N.; BINCHEVICI, V. A. (Elsevier, 1995)
    The dependence of additional optical losses due to illumination of optical As2S3 glass fibers has been investigated.
  • 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) ...
  • Photoinduced effects and light emission in Ga-La-S:Pr/sup 3+/ glass 
    SEDDON, A .B.; FURNISS, D.; JOVU, M. S.; SHUTOV, S. D.; SYRBU, N. N.; ANDRIESH, A. M.; HERTOGEN, P.; ADRIAENSSENS, G. J. (IEEE, 2003)
    The absorption and radiation spectra of Ga-La-S-O glasses with fixed cation ratio Ga/La=0.7/0.3 and two oxygen content 0.65 Wt % and 2.95 Wt % were studied for two Pr/sup 3+/ doping levels of 0.1 and 1.0 Wt %. Presence of ...
  • 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 ...
  • 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. ...
  • Superimposed diffraction gratings formed by e-beam recording in chalcogenide films 
    ANDRIESH, A. M.; AKIMOVA, E. A.; ENAKI, M. A.; SERGEEV, S. A.; TRIDUH, G. M. (Institutul de Fizică Aplicată al AŞM, 2012)
    It was established, that at low values of recording current the independent superimposition (without reciprocal effect) of crossed index gratings can be occurred. Contrary to this, in the case of the relief structures the ...

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